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FB-100-UC04-H

FB-100-UC04-H

  • 厂商:

    AEARO

  • 封装:

  • 描述:

    圆形支座 有螺纹 #4-40 合成橡胶 0.320"(8.13mm) 黑色

  • 数据手册
  • 价格&库存
FB-100-UC04-H 数据手册
S T A N D A R D P A R T S C A T A L O G A N D Engineering Design Guide E l e c t r o n i c s W e b s i t e : w w w. e a r s h o c k a n d v i b e . c o m C o m p a n y W e b s i t e : w w w. e a r s c . c o m Toll-Free Solutions Hotline (877) EAR-IDEA (327-4332) SOLUTION ENGINEERING FOR NOISE, BROADEST LINES OF MATERIALS AND PARTS ISODAMP ® C-1000 SERIES ELASTOMERS • Optimized shock and vibration control via high internal damping • Control shock pulses in minimal sway space • Three temperature-tuned formulations TYPICAL APPLICATIONS: • Hard disk drive mounting in computers, DVRs and MP3 players • Fan and blower mounting (tool-less) for noise control • Low rebound bumpers, crash stops and shock pads • Stepper motor mounting ISODAMP ® C-8002 SERIES ELASTOMERS • Environmentally-friendly, halogen-free formulation • Optimized shock and vibration control via high internal damping • Control shock pulses in minimal sway space TYPICAL APPLICATIONS: • Hard disk drive mounting in computers, DVRs and MP3 players • Fan and blower mounting (tool-less) for noise control • Low rebound bumpers, crash stops and shock pads • Stepper motor mounting VERSADAMP ™ 2000 SERIES ELASTOMERS • Provide uniform performance over a broad temperature range (-40C to 125C) • Adjustable damping level from moderate to high • Adjustable durometer (40 to 74 Shore A) • Adjustable properties enable custom-tuned dynamic response • 10 standard formulations TYPICAL APPLICATIONS: • Circuit board snubbers for portable electronics • Hard disk drive protection in portable electronics • LCD shock protection frames and bezels • External bumpers for ruggedized portable electronics • Microphone, speaker and other transducer isolation boots • Isolation of vibration sources in automotive applications ISOLOSS ® HD THERMOSET ELASTOMER • High internal damping • Excellent resistance to creep and compression set • Can be metal-bonded during molding TYPICAL APPLICATIONS: • Rotational vibration control for hard disk drives in servers and mass storage units (hot swap and fixed carrier designs) • Isolation mounts for hard disk drive manufacturing test racks • Standard and custom sandwich mounts 2 E-A-R Specialty Composites provides a wide range of materials and component options for controlling complex noise, vibration, motion and mechanical shock. Standard components include grommets, fan mounts, bushings and equipment feet. This extensive offering of standard parts will often provide an “off-the-shelf” solution that meets design requirements. In addition, E-A-R offers the industry’s broadest range of engineered elastomer platforms specifically developed to address mechanical energy control challenges that are common in today’s complex OEM product designs. Designers can choose from four standard materials platforms— ISODAMP C-1000 Series elastomers, ISODAMP C-8002 Series elastomers, VersaDamp 2000 Series TPEs and ISOLOSS HD thermoset polyurethanes—to obtain precisely the right combination of performance and physical properties. The ISODAMP, ISOLOSS and VersaDamp material platforms are highly damped elastomers, exhibiting extremely low rebound characteristics. This ensures extremely low amplification at resonance and rapid settling to equilibrium after impulsive shock or vibration input. In addition, the VersaDamp platform offers adjustable damping and stiffness, enabling the design engineer to custom-tune a part’s dynamic response. VersaDamp TPEs also offer an extended service temperature range, making them ideal for portable electronics and automotive applications. E-A-R’s ISODAMP C-8002 Series thermoplastic molding material combines excellent damping performance and mechanical strength with compliance to environmental and other high cleanliness specifications, for high performance solutions in a wide variety of molded parts applications. Additional features and typical applications for each of the materials platforms are listed at left. More detailed information on E-A-R’s full line of elastomers is contained in materials summary sheets and technical data sheets available directly from the company, on the Website at www.earsc.com or on the electronics Website at www.earshockandvibe.com. Ta b l e o f C o n t e n t s 4 . 7. . 8. . 9. . 10. 13 15. 16. 18. 19. 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ISODAMP & VersaDamp Grommets ISODAMP & VersaDamp Bushings ISODAMP Equipment Mounts ISODAMP Fan Mounts & Shoulder Bolts Performance Calculation Guide ISOLOSS Grommets & Mounts ISOLOSS Performance Calculation Guide Installation Hints Reduced Frequency Nomograms Typical Materials Properties Elastomer Comparison Guide 25 Figure 1 Natural rubber 20 15 Transmissibility (dB) Neoprene VIBRATION, SHOCK, CUSHIONING 10 5 VersaDamp 0 1 2 -5 -10 ISODAMP -15 -20 -25 Frequency Ratio F/F s(log scale) Poorly damped isolators can amplify incoming vibration, causing damage and excess noise. E-A-R isolators minimize this concern and better accommodate variable-frequency, impulsive or broadband vibration sources. THE DIFFERENCE IS THE DAMPING A poorly damped isolator (typically made from natural rubber or silicone), that is soft enough for good vibration isolation, may require more sway space for deflection during a shock input than the product’s design can provide. So a stiffer isolator may be needed to prevent crashing or bottoming out, but this could have a negative effect on vibration performance. E-A-R’s highly damped elastomers help mitigate this common conflict. Traditional practice has dictated that the natural frequency of an isolation mount be well below the operating frequency of the vibration source. This tactic seeks to avoid a situation where the source’s operational frequency is near the mount’s natural frequency, causing excessive amplification of the transmitted vibration. In practice, though, it is often difficult to avoid excitation of the isolation system’s resonance, especially in complex systems that cycle on and off, change speed or produce broadband, multi-frequency vibration. With E-A-R’s highly damped elastomers, vibration amplification is minimized. Figure 1 illustrates how an elastomer’s loss factor (m, a measure of hysteretic damping) influences vibration amplification. E-A-R’s elastomers, with material loss factors near 1.0, exhibit a maximum amplification of only 3 to 5 dB (1.4X to 1.8X). Natural rubber or silicone isolators, with loss factors as low as 0.05, can exhibit excessive amplification as high as 25dB (18X). This reduced amplification minimizes the traditional need for an isolation system with a low natural frequency. As a result, a stiffer mount can be used to better accommodate shock requirements while still providing the vibration isolation performance necessary for most noise control applications. Shock Protection: Reducing Space, Time and Magnitude For most OEM shock protection applications, E-A-R’s highly damped elastomers offer two important advantages: Figures 2 and 3 illustrate how the loss factor of an isolator material can influence shock response (transmitted acceleration and peak deflection). E-A-R’s highly damped elastomers, with loss factors near 1.0, provide lower peak acceleration and deflection resulting in a higher degree of shock protection within a smaller package design. Poorly damped elastomers often require twice as much sway space to provide the same level of shock protection. This benefit is critical given the tight space constraints that are common in today’s smaller portable electronic devices and component-dense OEM products. In addition, as shown in Figures 2 and 3, E-A-R elastomers provide a quick return to equilibrium while the poorly damped system continues to oscillate and flex. Post-shock, resonant oscillation is a primary contributor to electromechanical system performance loss and component fatigue failure in portable electronic devices. E-A-R’s highly damped elastomers help to reduce these post-shock oscillations, increase product performance and extend product life. Shock Response 120 Input Pulse Figure 2 Lightly Damped Isolator Response (Silicone, Rubber, etc.) 80 η ≈0.1 E-A-R elastomers result in lower peak Gs and faster settling, which can help to increase product performance. m Acceleration (G) Optimized Shock and Vibration Control Vibration is typically characterized by continuous oscillatory motion of relatively small amplitude, while shock commonly features a relatively large, sudden change in acceleration due to an applied dynamic force. Consequently, vibration and shock considerations often place conflicting requirements on an isolation system. • Lower peak acceleration (Gs) and displacement (sway) response to shock input, compared to poorly damped elastomers. • Dramatically reduced settling time after shock input. 40 ISODAMP Response 0 η ≈1.0 m -40 -80 -120 0 0.005 0.01 0.015 0.02 Time (sec) Displacement Response 0.04 Figure 3 0.03 Displacement (in) E-A-R damped elastomers offer important advantages over poorly damped materials, such as natural and synthetic rubber, silicone and commodity TPEs. These advantages are especially important when attempting to control noise, shock and vibration in today’s complex and component-dense OEM products. E-A-R elastomers reduce sway space requirements by nearly half, allowing for compact shock protection systems. Lightly Damped Isolator Response (Silicone, Rubber, etc.) η ≈0.1 m 0.02 0.01 ISODAMP Response η ≈1.0 m 0 -0.01 -0.02 -0.03 -0.04 0 0.005 0.01 Time (sec) 0.015 0.02 3 ISODAMP & VERSADAMP GROMMETS PERFORMANCE GRAPH 3.0 G F B E H STIFFNESS RATIO Ribbed Symmetric C 1.0 A D Figure 1 0.1 0.1 Symmetric, Internally Ribbed F B E H C A I N S TA L L AT I O N H I N T S 1.0 LOAD RATIO 3.0 0.3 1.0 LOAD RATIO 3.0 3.0 STIFFNESS RATIO G 0.3 1.0 D Figure 2 SEE PAGE 16 0.1 0.1 S Y M M E T R I C / S Y M M E T R I C I N T E R N A L LY R I B B E D Figure No. Part No. Figure 1 Figure 1 Figure 1 Figure 1 Figure 2 Figure 2 Figure 2 Figure 2 Axial Load Factor (lb) Stiffness Factor (lb/in) 1.6 1.6 1.6 1.6 1.7 1.8 1.7 1.8 2091 5130 3361 8200 1988 1911 1988 1911 G-401 G-402 G-403 G-404 G-410 G-411 G-412 G-414 Radial Load (lb) Load Stiffness Factor Factor (lb) (lb/in) A B C Recommended Maximum Plate Thckns. Hole Diam. Inside Diam. 6.0 6.0 6.0 6.0 3.0 6.0 3.0 6.0 .063 .125 .063 .125 .057 .063 .031 .043 .375 .375 .375 .375 .250 .375 .250 .375 .224 .226 .276 .281 .158 .188 .158 .188 0.9 1.8 0.9 1.8 0.5 0.9 0.5 0.9 6341 9719 7048 9836 2683 1153 2683 1153 Dimensions (inches) D E Overall Outside Height Diam. .313 .375 .313 .375 .230 .323 .230 .323 .563 .563 .625 .625 .379 .563 .379 .563 F G H Edge Radius Rib Height Rib Width .125 .125 .125 .125 .050 .130 .050 .130 .063 .063 .063 .063 .040 .063 .040 .063 .063 .063 .063 .063 .050 .063 .050 .063 PERFORMANCE GRAPH 3.0 Asymmetric STIFFNESS RATIO F A G CE B H I D ASYMMETRIC Part No. G-430 G-431 Axial Load Factor (lb) Stiffness Factor (lb/in) 1.2 1.8 3724 3789 J 0.1 0.1 Radial Load (lb) Load Stiffness Factor Factor (lb) (lb/in) A B C Recommended Maximum Plate Thckns. Hole Diam. Inside Diam. 5.0 8.0 .055 .055 .375 .560 .180 .172 0.8 1.2 2704 2610 Dimensions given here are nominal. Exact specification print available on request. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com 4 • 0.3 1.0 LOAD RATIO 3.0 Dimensions (inches) For C-1002 material, indicate “-1” after part number (e.g. G-401-1) For C-1105 material, indicate “-2” after the part number (e.g. G-401-2) For C-1100 material, indicate “-3” after the part number (e.g. G-401-3) For C-8002 material, indicate “-8” after the part number (e.g. G-401-8) For VersaDamp material, indicate “-formulation number” after the part number (e.g. G-401-2325) Aearo Technologies 1.0 D E F/G H/I J Overall Outside Lg./Sm. Lg./Sm.Rib Rib Height Diam. Flg. Height Height Width .395 .390 .560 .210/.130 .100/.065 .062 .750 .210/.125 .100/.065 .062 C-1002 Grommet Color Peak Performance Temp. Range at 1000 Hz C-1105 C-1100 C-8002 VersaDamp Blue Turquoise Yellow Sky Blue Black 55F-105F 80F-130F 95F-145F 62F-105F -40F-122F (13C-41C) (27C-54C) (35C-63C) (17C-41C) (-40C-50C) *Refer to page 19 for additional temperature data. 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company ISODAMP & VERSADAMP GROMMETS Symmetric, Low-Load F PERFORMANCE GRAPH 3.0 C B STIFFNESS RATIO E G A Figure 1 D B H B E C C Figure 2 FG SYMMETRIC, LOW-LOAD Figure No. Part No. Stiffness Factor (lb/in) 0.8 0.2 0.2 725 381 381 G-427 G-461 G-462 0.3 1.0 LOAD RATIO AA Radial Load (lb) Load Stiffness Factor Factor (lb) (lb/in) Recommended Maximum 0.7 0.2 0.2 Non-Ribbed 3.0 Dimensions (inches) A 3475 392 392 B Plate Hole Thckns. Diam. 1.5 0.3 0.3 .049 .037 .047 .312 .298 .304 C D E Inside Diam. Overall Outside Height Diam. .180 .157 .153 .194 .271 .276 F G Rib Height Rib Width .025 .063 .063 .056 .051 .051 .440 .393 .393 I N S TA L L AT I O N H I N T S SEE PAGE 16 D E C PERFORMANCE GRAPH 3.0 Symmetric A STIFFNESS RATIO Figure 1 Figure 2 Figure 2 0.1 0.1 FE D D Axial Load Factor (lb) 1.0 F B 1.0 0.1 0.1 0.3 1.0 LOAD RATIO 3.0 SYMMETRIC Part No. G-501 G-502 G-503 G-504 G-505 G-506 G-507 Axial Load Factor (lb) Stiffness Factor (lb/in) 4.2 4.3 2.1 3.0 4.3 3.3 9.0 17983 12985 6640 12744 14745 12805 7775 Radial Load Stiffness Factor Factor (lb) (lb/in) 0.5 0.8 0.5 0.7 0.8 0.8 1.4 40450 10640 14495 9170 15099 7252 9739 Load (lb) Dimensions (inches) A Recommended Maximum 17.0 17.0 10.0 13.0 17.0 14.0 40.0 B C Plate Hole Thckns. Diam. .060 .063 .054 .063 .062 .043 .070 .360 .338 .244 .309 .375 .319 .503 Inside Diam. .187 .182 .190 .183 .190 .177 .277 D E Overall Outside Height Diam. .120 .182 .306 .187 .175 .220 .396 .500 .500 .385 .437 .500 .460 .751 F G H Edge Radius Lg. Flg. Height Sm. Flg Height n/a n/a .020 n/a n/a .020 .050 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a C-1100 C-8002 For C-1002 material, indicate “-1” after part number (e.g. G-401-1) For C-1105 material, indicate “-2” after the part number (e.g. G-401-2) For C-1100 material, indicate “-3” after the part number (e.g. G-401-3) For C-8002 material, indicate “-8” after the part number (e.g. G-401-8) For VersaDamp material, indicate “-formulation number” after the part number (e.g. G-401-2325) Grommet Color Peak Performance Temp. Range at 1000 Hz Dimensions given here are nominal. Exact specification print available on request. *Refer to page 19 for additional temperature data. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies • C-1002 C-1105 VersaDamp Blue Turquoise Yellow Sky Blue Black 55F-105F 80F-130F 95F-145F 62F-105F -40F-122F (13C-41C) (27C-54C) (35C-63C) (17C-41C) (-40C-50C) 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 5 ISODAMP & VERSADAMP GROMMETS PERFORMANCE GRAPH Non-ribbed 3.0 STIFFNESS RATIO Symmetric, Radiused-Edge F A E C B D 0.1 0.1 Figure 1 Asymmetric STIFFNESS RATIO A H C E B D Axial Load Factor (lb) Stiffness Factor (lb/in) 5.3 9.8 6.5 6.6 5593 8467 5844 11465 G-521 G-511 G-512 G-513 Radial Load (lb) Load Stiffness Factor Factor (lb) (lb/in) Recommended Maximum 0.9 1.4 1.9 1.4 1.0 LOAD RATIO 3.0 0.3 1.0 LOAD RATIO 3.0 1.0 0.1 0.1 SYMMETRIC, RADIUS-EDGE / ASYMMETRIC Figure No. Part No. 0.3 3.0 G Figure 2 Figure 1 Figure 2 Figure 2 Figure 2 1.0 Dimensions (inches) A 7470 5159 6951 12687 B C Plate Hole Thckns. Diam. 25.0 40.0 26.0 40.0 .062 .063 .115 .078 .375 .562 .437 .500 D Inside Diam. E Overall Outside Height Diam. .270 .180 .245 .304 .325 .395 .620 .500 .625 .753 .625 .750 F G H Edge Radius Lg. Flg. Height Sm. Flg. Height .125 n/a n/a n/a n/a .214 .380 .290 n/a .118 .125 .132 PERFORMANCE GRAPH 3.0 STIFFNESS RATIO I N S TA L L AT I O N H I N T S Shear SEE PAGE 16 D E C BG F 0.1 0.1 SHEAR Part No. G-601 Axial Radial Load (lb) Load Stiffness Factor Factor (lb) (lb/in) Load Stiffness Factor Factor (lb) (lb/in) Recommended Maximum 1.8 382 2.1 2.0 .056 Dimensions given here are nominal. Exact specification print available on request. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com 6 • B C Plate Hole Thckns. Diam. For C-1002 material, indicate “-1” after part number (e.g. G-401-1) For C-1105 material, indicate “-2” after the part number (e.g. G-401-2) For C-1100 material, indicate “-3” after the part number (e.g. G-401-3) For C-8002 material, indicate “-8” after the part number (e.g. G-401-8) For VersaDamp material, indicate “-formulation number” after the part number (e.g. G-401-2325) Aearo Technologies 0.3 1.0 LOAD RATIO 3.0 Dimensions (inches) A 721 1.0 .560 Inside Diam. .248 D E F Overall Outside Height Diam. .375 .750 n/a C-1002 Grommet Color Peak Performance Temp. Range at 1000 Hz G Flange Boss Out. Thickns. Diam. C-1105 n/a C-1100 C-8002 VersaDamp Blue Turquoise Yellow Sky Blue Black 55F-105F 80F-130F 95F-145F 62F-105F -40F-122F (13C-41C) (27C-54C) (35C-63C) (17C-41C) (-40C-50C) *Refer to page 19 for additional temperature data. 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company ISODAMP & VERSADAMP BUSHINGS Ribbed Bushings PERFORMANCE GRAPH G 3.0 STIFFNESS RATIO D H R-444 E C Ribbed A B B-434 E 0.1 0.1 C 0.3 1.0 LOAD RATIO D H 3.0 G D D C R-445 E H Part No. R-444 B-434 R-445 B-435 F 1.0 Axial* Load Factor (lb) Stiffness Factor (lb/in) 2.1 2.1 6.3 6.3 1192 1192 650 650 G Radial* 1.5 1.5 2.5 2.5 A C Load (lb) Load Stiffness Factor Factor (lb) (lb/in) B-435 BE Dimensions (inches) A B C D E F G H Recommended Maximum Shank Height Shank Diam. Inside Diam. Overall Height Flange Diam. Flange Height Rib Height Rib Width 10.0 10.0 25.0 25.0 n/a .313 n/a .544 n/a .469 n/a .473 .460 .250 .813 .260 .563 .813 .457 .520 1.000 .260 1.060 1.000 n/a .250 n/a .516 .078 .078 .132 .132 .085 .085 .125 .135 1095 1095 1000 1000 * Normalized data using rings and bushings together Non-ribbed I N S TA L L AT I O N H I N T S SEE PAGE 16 D B C 0.1 0.1 Axial Radial 1.0 LOAD RATIO 3.0 Dimensions (inches) Load Factor (lb) Stiffness Factor (lb/in) Load Factor (lb) Stiffness Factor (lb/in) A B C D E F G H Recommended Maximum Shank Height Shank Diam. Inside Diam. Overall Height Flange Diam. Flange Height Rib Height Rib Width 4.1 9.5 28.5 20235 30725 30500 3.5 4.2 5.0 15575 20772 11500 17.0 40.0 100.0 .120 .139 .085 .360 .420 .750 .189 .271 .427 .175 .259 .325 .500 .750 1.265 .055 .120 .240 n/a n/a n/a n/a n/a n/a Dimensions given here are nominal. Exact specification print available on request. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com • 0.3 Load (lb) For C-1002 material, indicate “-1” after part number (e.g. G-401-1) For C-1105 material, indicate “-2” after the part number (e.g. G-401-2) For C-1100 material, indicate “-3” after the part number (e.g. G-401-3) For C-8002 material, indicate “-8” after the part number (e.g. G-401-8) For VersaDamp material, indicate “-formulation number” after the part number (e.g. G-401-2325) Aearo Technologies 1.0 A Part No. B-531 B-532 B-533 STIFFNESS RATIO F E PERFORMANCE GRAPH 3.0 Non-ribbed Bushings C-1002 Grommet Color Peak Performance Temp. Range at 1000 Hz C-1105 C-1100 C-8002 VersaDamp Blue Turquoise Yellow Sky Blue Black 55F-105F 80F-130F 95F-145F 62F-105F -40F-122F (13C-41C) (27C-54C) (35C-63C) (17C-41C) (-40C-50C) *Refer to page 19 for additional temperature data. 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 7 ISODAMP EQUIPMENT MOUNTS B A C - 1 0 0 2 M O U N T I N G PA D S Part No. MP-506 MP-512 MP-725 MP-1025 Load (lb) Dimensions (inches) A B C D E F Recommended Maximum Diam. Overall Height Inside Diam. Overall Height Outside Diam. Bolt Flg. Height 15.0 15.0 30.0 30.0 .500 .500 .743 0.98 .060 .125 .260 .240 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a E B C C-1002 MOUNTING FEET A D Part No. Load (lb) Dimensions (inches) A Recommended Maximum MF-1010 MF-1010PSA B Bolt Flg. Bolt Flg. Height Diam. 15.0 15.0 .270 .270 .493 .493 C D E F Inside Diam. Overall Height Outside Diam. Bolt Flg. Height .123 .123 .521 .521 .982 .982 n/a n/a F BE C C-1002 MOUNTING FEET Part No. L-020 L-021 L-030 L-031 A D Load (lb) Dimensions (inches) A B C D E F Recommended Maximum Shank Height Shank Diam. Inside Diam. Mount Height Mount Diam. Bolt Flg. Height 20.0 20.0 20.0 20.0 .215 n/a .215 n/a .500 n/a .509 n/a .194 .194 .325 .320 .755 .755 .755 .755 1.502 1.502 1.502 1.502 .410 .410 .410 .410 B E C A C-1002 EQUIPMENT MOUNTS Part No. ML-4250 ML-42100 ML-42200 ML-42500 D Load (lb) Dimensions (inches) A B C D E F Recommended Maximum Shank Height Shank Diam. Inside Diam. Mount Height Mount Diam. Bolt Flg. Height 70.0 140.0 300.0 700.0 .125 .188 .260 .355 .500 .750 1.010 1.000 .327 .443 .575 .549 .625 .820 1.007 1.385 1.172 1.656 2.371 3.667 n/a n/a n/a n/a Dimensions given here are nominal. Exact specification print available on request. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies 8 • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company ISODAMP FAN MOUNTS F-340 C F-344 Dimensions (mm) ▲ ▲ B B C A F-340 F-344 F-345 F-347 A F-345 F-347 D Suggested Fan Sizes (mm) A B C D Fan Hole Diam Fan Hole Depth Plate Thickness Plate Hole Diam Flange Thickness Hole Diameter 2.5 4.4 3.5 4.4 5.0 3.0 3.8 4.5 .80 1.3 1.3 0.8 2.75 4.4 3.5 4.5 4.5-5.5 2.5-3.5 3.3-4.3 3.9-5.0 2.5-3.5 3.8-4.7 3.9-5.3 3.7-4.7 D D I N S TA L L AT I O N H I N T S ▲ ▲ ▲ ▲ D B C Part No. SEE PAGE 16 & 17 B C A A S H O U L D E R B O LT S Material: low-carbon steel with zinc chromate coating Part No. SB-4102 SB-4105 SB-4107 SB-4112 SB-4114 SB-4118 Grommet Dimensions (inches) G-410 G-410 G-410 G-411 G-411 G-411 A A D F G Head + .020 Shoulder Length + .005 Shoulder + .0025 Thread .350 .350 .350 .500 .500 .500 .214 .214 .214 .300 .300 .250 .161 .161 .161 .196 .194 .188 6-32 UNC-2A M3-0.5 M3-0.5 6-32 UNC-2A M4-0.7 6-32 UNC-2A D E F G ISODAMP & VERSADAMP ISOLATORS Plug Grommet E F B E E Pin Grommet Corner Bumper AG F B C A D C B C B A C H D D D E Family Product Dimensions (inches) B C D A I S O D A M P / Ve r s a D a m p PLUG GROMMETS P-410 P-411 P-415 Plate Thckns. .057 .063 .039 A Plate Thckns. PIN GROMMETS PG-100 1.5 A CORNER BUMPERS CB-100 CB-101 Hole Diam. Hole Diam. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Pin Diam. Grommet Height 6.4 2.5 5.0 Dimensions (mm) B C D Drive Thckns. Bumper Height Bumper Length Side Wall Thckns. 5.0 5.0 9.75 8.00 6.00 6.75 1.5 1.5 Dimensions given here are nominal. Exact specification print available on request. • Overall Height E F Outside Diam. Snap-fit Diam. .250 .158 .255 .379 .375 .188 .323 .563 .250 .158 .255 .379 Dimensions (mm) B C D E For C-1002 material, indicate “-1” after part number (e.g. G-401-1) For C-1105 material, indicate “-2” after the part number (e.g. G-401-2) For C-1100 material, indicate “-3” after the part number (e.g. G-401-3) For C-8002 material, indicate “-8” after the part number (e.g. G-401-8) For VersaDamp material, indicate “-formulation number” after the part number (e.g. G-401-2325) Aearo Technologies Inside Diam. .344 .457 .365 F G H Outside Diam. Edge radius. Lg Flg. Height Sm Flg. Height 9.8 1.27 1.75 1.75 E F Bottom Top Wall Wall Thckns. Thckns. 1.5 1.5 3.25 1.50 C-1002 Grommet Color Peak Performance Temp. Range at 1000 Hz C-1105 C-1100 C-8002 VersaDamp Blue Turquoise Yellow Sky Blue Black 55F-105F 80F-130F 95F-145F 62F-105F -40F-122F (13C-41C) (27C-54C) (35C-63C) (17C-41C) (-40C-50C) *Refer to page 19 for additional temperature data. 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 9 PERFORMANCE CALCULATION GUIDE HOW TO CALCULATE MOUNT STIFFNESS AND NATURAL FREQUENCY FOR ISODAMP AND VERSADAMP ISOLATORS TEMPERATURE/FORMULATION CORRECTION CHART Temperature F (C) 45F (7C) 50F (10C) 55F (13C) 60F (16C) 65F (18C) 70F (21C) 75F (24C) 80F (27C) 85F (29C) 90F (32C) 95F (35C) 100F (38C) 105F (41C) 110F (43C) 115F (46C) 120F (49C) 125F (52C) 130F (54C) 135F (57C) 140F (60C) 145F (63C) 150F (66C) 155F (68C) 160F (71C) C-1002 Correction Factor 8.58 5.86 2.80 1.94 1.39 1.00 .075 0.56 0.44 0.35 0.29 0.25 0.22 0.20 0.18 0.17 0.16 0.16 0.15 0.15 0.15 0.14 0.14 0.14 C-1105 Correction Factor — — 8.26 5.90 4.28 3.11 2.28 1.70 1.30 1.00 0.78 0.63 0.51 0.42 0.34 0.29 0.28 0.27 0.24 0.22 0.20 0.19 0.18 0.17 C-1100 Correction Factor — — — — — 8.85 6.25 4.45 3.24 2.36 1.74 1.30 1.00 0.77 0.61 0.49 0.43 0.41 0.34 0.30 0.26 0.23 0.22 0.20 C-8002 Correction Factor 31.61 22.22 15.33 10.39 7.95 5.28 3.51 2.38 1.87 1.34 1.01 0.80 0.67 0.61 0.55 0.50 0.48 0.47 0.45 0.44 0.44 0.43 0.43 0.43 V-2325 Correction Factor 0.53 0.49 0.46 0.43 0.41 0.39 0.37 0.35 0.34 0.33 0.32 0.32 0.31 0.31 0.30 0.30 0.30 0.30 0.29 0.29 0.29 0.29 0.29 0.29 V-2590 Correction Factor 1.85 1.56 1.24 1.16 1.07 0.96 0.87 0.80 0.77 0.72 0.69 0.66 0.64 0.63 0.62 0.61 0.60 0.59 0.59 0.58 0.58 0.57 0.57 0.57 V-2599 Correction Factor 2.18 1.85 1.9 1.39 1.27 1.14 1.03 0.95 0.90 0.84 0.80 0.77 0.74 0.73 0.71 0.70 0.69 0.68 0.67 0.66 0.66 0.66 0.66 0.65 V-2750 Correction Factor 1.30 1.22 1.15 1.10 1.07 1.02 0.97 0.91 0.87 0.81 0.76 0.71 0.67 0.65 0.63 0.61 0.60 0.60 0.59 0.58 0.58 0.58 0.58 0.58 Non-shaded area indicates peak damping performance temperature range. Predicting E-A-R isolator performance is simple. Just follow the performance graphs represents the dynamic stiffness for a C-1002 instructions below and refer to the grommet data tables and grommet at 70F (21C). The Temperature/ Formulation Correction performance graphs beginning on Page 4. Chart above makes it easy to determine the dynamic stiffness of any ISODAMP or VersaDamp grommet for any operating temperature. DETERMINING DYNAMIC STIFFNESS Select a candidate ISODAMP or VersaDamp grommet based on your application parameters—load per isolator, axial (horizontal plate) or radial (vertical plate) orientation, and plate dimensions. Follow these steps to determine a grommet’s dynamic stiffness by using the data table and performance graph for the grommet style you have chosen. • From the data table—Locate the load factor for the chosen grommet and orientation (axial or radial). Now, divide the grommet load (lb/grommet) by the load factor. The result is the load ratio. Simply multiply the correction factor from this chart by the stiffness just calculated to get the dynamic stiffness value (lb/in) of the grommet in the material of choice for your operating temperature range. N AT U R A L F R E Q U E N C Y C A L C U L AT I O N Calculations from the grommet data tables and grommet performance graphs are intended to determine dynamic stiffness values for E-A-R grommets. This stiffness data is basic to predicting overall system response and system natural frequency. • To the performance graph—Locate the load ratio value on the curve (x-axis), and read the resulting stiffness ratio from the y-axis. • Back to the data table—Multiply this stiffness ratio value by the The natural frequency of a particular E-A-R grommet can now be calculated using the following formula: stiffness factor. And this is the per grommet stiffness (lb/in). CORRECTION FOR ELASTOMER FORMULAT I O N A N D O P E R AT I N G T E M P E R AT U R E Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com 10 • K = Dynamic stiffness (lb/in) W = Load per grommet (lb) The stiffness calculated from the grommet data tables and Aearo Technologies Fn = 3.13 √ K ÷ W WHERE: Fn = Natural frequency of the grommet (Hz) 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company PERFORMANCE CALCULATION GUIDE Vibration Isolation HOW TO CALCULATE VIBRATION ISOLATION PERFORMANCE Figure 2 Figure 1 EXAMPLE CALCULATION: COMPUTER HARD DRIVE K = Dynamic stiffness (lb/in) W = Load per grommet (lb) Problem Statement • Our example is a 1.5 lb hard drive isolated with four G-411-2 (ISODAMP C-1105) grommets at 100F. Lateral hard drive vibration produces axial grommet deflection (y direction, see Figure 2). We therefore will utilize the axial mount data for the stiffness calculation. Four grommets will be used to support the hard drive. Two grommets are shown in Figure 1 and two are located on the opposite side. Natural Frequency (Hz) (resonance) √ Fn = 3.13 K÷W Cross-Over Frequency (where isolation begins) √ Fx = 4.42 K÷W = √2 Stiffness and Natural Frequency Calculation Fn Peak Transmissibility (maximum amplification) 0.375 ÷ 1.8 = 0.208 • Use the performance graph to determine the stiffness ratio: load ratio of  0.208 corresponds to stiffness ratio of 3.0 Isolation System Transmissibility • From the data table: stiffness factor = 1911 lb/in • Effective stiffness is stiffness factor x stiffness ratio: 1911 lb/in x 3 = 5733 lb/in 3 Transmissibility • From the data table on Page 4: load factor = 1.8 • Divide load per grommet by load factor to get load ratio: Tmax = √ 1 + 2 1.6 • Load per grommet: 1.5 lb ÷ 4 = 0.375 lb/grommet B High Damping (E-A-R C-1105) • Determine the temperature correction factor for C-1105 material @ 100F. A 1 C .3 Temperature correction factor=0.63. Isolation Region .2 • Actual grommet dynamic stiffness: 5733 lb/in x 0.63 = 3612 lb/in D .1 Isolation Performance Calculation 6 2 4 8 √2 Frequency Ratio (Fd/Fn) 1 • Cross-Over Frequency = Figure 3 11 70 60 50 40 30 √ 2 x 307 = 434 Hz • Fd = Resonant Frequencies to avoid in computer housings: 1000 to 2000 Hz. • Frequency Ratio = Fd/Fn = 1000 Hz ÷ 307 Hz & 2000 Hz ÷ 307 Hz = 3.25 & 6.5 C-1105 DEGREES CELSIUS 10 √ (3612 ÷ 0.375) = 307 Hz • Natural Frequency Fn = 3.13 .15 20 10 0 -10 • Per the graph in Figure 3 using frequency ratios, there will be 0.3 to 0.15 10000 Transmissibility (or 70 percent to 85 percent isolation) in that range 10 • To estimate peak transmissibility as shown in Figure 3, use loss factor from 1000 10 the material nomogram (Figure 4) and equation at left. (m=0.8, Tmax=1.6) 9 100 10 (1.0) FREQUENCY (Hz) DYNAMIC MODULUS (DYNES/CM2) (LOSS FACTOR) MODULUS Note: For instructions on how to read a material nomogram, see Page 18. LOSS FACTOR 8 10 7 1 10 (0.1) 10 Figure 4 Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 11 PERFORMANCE CALCULATION GUIDE HOW TO CALCULATE SHOCK RESPONSE PERFORMANCE Acceleration Response  = 0.0 1.8 0.10 100 0.20 0.40 0.60 1.6 Transmissibility 120 1.4 0.0 1.00 1.2 Acceleration (G) Protection Shock Transmissibility 0.10 0.20 1.0 2.00 0.8 Response 60 40 20 0 0.6 -20 0.4 -40 0 0.2 0 Input 80 0 2 4 6 8 10 12 14 16 18 20 0.002 0.004 0.006 0.01 Time (ms) 22 Figure 2 Natural Frequency x Effective Duration Figure 1 COMPUTER HARD DRIVE SHOCK PROTECTION Problem Statement K = Dynamic stiffness (lb/in) W = Load per grommet (lb) • Our example is a 1.5 lb hard drive isolated with four G-411-2 grommets at 100F. The shock input: Half Sine 100G @ 2ms. The shock input creates radial loading of grommets (z direction in Figure 2, Page 11). Therefore, we will utilize radial mount data for our stiffness calculation. Four grommets are used to support the hard drive (see Figure 1, Page 11). Shock Natural Frequency (rad/sec) (resonance) n = 19.65 √ K÷W Stiffness and Natural Frequency Calculation Shock Input: Half Sine (100G, 2ms) • Load per grommet: 1.5 lb ÷ 4 = 0.375 lb/grommet • From the data table on Page 4: load factor = 0.9 • Divide load per grommet by load factor to get load ratio: 0.375 ÷ 0.9 = 0.417 • Use the performance graph to get the stiffness ratio: load ratio of 0.417 corresponds to stiffness ratio of 1.5 • From the data table: stiffness factor = 1153 lb/in • Effective stiffness will be stiffness factor x stiffness ratio = 1.5 x 1153= 1730 lb/in Peak Deflection Response (100G, 2ms half sine pulses) 1 • Determine the temperature correction factor for C-1105 material @ 100F. Temperature correction factor= 0.63. Displacement (in) m = 1.0 • Actual grommet dynamic stiffness: 1730 lb/in x 0.63 = 1090 lb/in m = 0.1 • Natural Frequency n = 1059 rad/sec (167 Hz) 0.1 Shock Protection Performance Calculation • Effective time duration for half sine shock is 0.637 x actual duration: 0.637 x 0.002 sec = 0.00127 sec • Take natural frequency x effective duration = 1059 rad/sec x 0.00127 sec = 1.35 and find response in Figure 1 using loss factor = 1.0 curve. 0.01 0 500 1000 Natural Frequency ( n ) Figure 3 1500 • Transmissibility is just slightly less than one. Calculated time response (via computer algorithm) in Figure 2 confirms this. Often, this is quite acceptable where the designer wants to ensure that the system does not amplify shock. • Peak deflection for this system is 0.022 inch as determined from graph in Figure 3 using the C-1105 material. A curve is shown for poorly damped material such as natural rubber (m=0.1). The peak displacement would then be 0.039 inch which is 77 percent higher than the ISODAMP C-1105 material. This graph is valid for 100G, 2ms half sine pulses only. • Additional theory on shock protection calculations can be found in most shock and vibration handbooks. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies 12 • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company ISOLOSS GROMMETS / MOUNTS I N S TA L L AT I O N H I N T S SEE PAGE 17 Symmetric, Internally Ribbed G F B E H C A D S Y M M E T R I C , I N T E R N A L LY R I B B E D G R O M M E T S Part No. Dynamic Stiffness (lb/in) G-411-H G-411-SL20100 G-411-SL25200 Load (lb) Dimensions (inches) A B C Axial Radial Recommended Maximum Plate Thckns. Hole Diam. Inside Diam. D 1470 226 318 887 110 154 6.0 1.0 1.0 .063 .059 .059 E Overall Outside Height Diam. .375 .188 .375 .188 .375 .188 .313 .308 .308 F G H Edge Radius Rib Height Rib Width .125 .123 .123 .063 .059 .059 .063 .063 .063 G H .555 .555 .555 Shear D C E SHEAR BG F GROMMETS Part No. Dynamic Stiffness (lb/in) G-601-H G-601-SL20100 G-601-SL25200 Load (lb) Dimensions (inches) A B C Axial Radial Recommended Maximum Plate Thckns. Hole Diam. Inside Diam. D 294 57 67 557 111 131 2.0 .3 .3 .056 .050 .050 .565 .569 .569 .245 .245 .245 E F Overall Outside Height Diam. .375 .380 .380 Flange Thckns. .750 .755 .755 Boss Out. Rib Diam. Width .237 .245 .245 .375 .380 .380 n/a n/a n/a Equipment Mounts B E C A D EQUIPMENT MOUNTS Part No. ML-4250-H ML-4250-SL20100 ML-4250-SL25200 Load (lb) Dimensions (inches) A B C D E F G H Recommended Maximum Shank Height Shank Diam. Inside Diam. Overall Height Flange Diam. Flange Thckns. Boss Out. Diam. Rib Width 70.0 10.0 10.0 .125 .126 .126 .495 .500 .500 .309 .313 .313 .629 .625 .625 1.169 1.165 1.165 n/a n/a n/a n/a n/a n/a n/a n/a n/a “H” after part number indicates ISOLOSS HD material; “V” after part number indicates ISOLOSS VL material. Dimensions given here are nominal. Exact specification print available on request. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 13 ISOLOSS MOUNTS MALE-MALE / MALE-BLANK SANDWICH MOUNTS Part No. Male-Male Sandwich Mounts P P L MM-100-UC04-H MM-100-UC04-SL20100 MM-100-UC04-SL25200 MM-200-UC06-H MM-200-UC06-SL20100 MM-200-UC06-SL25200 MM-200-UC08-H MM-200-UC08-SL20100 MM-200-UC08-SL25200 MM-300-UC25-H MM-400-UC31-H MB-100-UC04-H MB-100-UC04-SL20100 MB-100-UC04-SL25200 MB-200-UC06-H MB-200-UC06-SL20100 MB-200-UC06-SL25200 MB-200-UC08-H MB-200-UC08-SL20100 MB-200-UC08-SL25200 MB-300-UC25-H MB-400-UC31-H D G G Male-Blank Sandwich Mounts L P D G Dynamic Stiffness (lb/in) Load (lbs) Dimensions Threads D L Compression Shear Max. Compressive Max. Shear Diam. (in) Length (in) 262 126 185 285 133 133 285 108 152 471 1108 262 96 132 285 116 133 285 101 139 471 1108 59 12 15 74 12 15 74 12 15 120 270 4.0 0.5 0.5 8.0 1.0 1.0 8.0 1.0 1.0 20.0 50.0 4.0 0.5 0.5 8.0 1.0 1.0 8.0 1.0 1.0 20.0 50.0 1.5 0.2 0.2 3.0 0.4 0.4 3.0 0.4 0.4 5.0 13.0 .275 .280 .280 .400 .405 .405 .400 .405 .405 .615 1.00 .275 .280 .280 .400 .405 .405 .400 .405 .405 .615 1.00 .320 #4-40 .200 .320 #4-40 .200 .320 #4-40 .200 .500 #6-32 .375 .500 #6-32 .375 .500 #6-32 .375 .500 #8-32 .375 .500 #8-32 .375 .500 #8-32 .375 .625 1/4-20 .500 .750 5/16-18 .625 .320 #4-40 .200 .320 #4-40 .200 .320 #4-40 .200 .500 #6-32 .375 .500 #6-32 .375 .500 #6-32 .375 .500 #8-32 .375 .500 #8-32 .375 .500 #8-32 .375 .625 1/4-20 .500 .750 5/16-18 .625 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a Type P G TD Overall Height Grip (in) Depth (in) .060 .060 .060 .060 .060 .060 .060 .060 .060 .100 .100 .060 .060 .060 .060 .060 .060 .060 .060 .060 .100 .100 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a I N S TA L L AT I O N H I N T S SEE PAGE 17 MALE-FEMALE / FEMALE-BLANK SANDWICH MOUNTS Part No. Dynamic Stiffness (lb/in) Load (lbs) Dimensions Male-Female Sandwich Mounts P L MF-100-UC04-H MF-100-UC04-SL20100 MF-100-UC04-SL25200 MF-200-UC06-H MF-200-UC06-SL20100 MF-200-UC06-SL25200 MF-200-UC08-H MF-200-UC08-SL20100 MF-200-UC08-SL25200 MF-300-UC25-H MF-400-UC31-H FB-100-UC04-H FB-100-UC04-SL20100 FB-100-UC04-SL25200 FB-200-UC06-H FB-200-UC06-SL20100 FB-200-UC06-SL25200 FB-200-UC08-H FB-200-UC08-SL20100 FB-200-UC08-SL25200 FB-300-UC25-H FB-400-UC31-H D G TD Female-Blank Sandwich Mounts L D TD Threads D L P G TD Compression Shear Max. Compressive Max. Shear Diam. (in) Length (in) Type Overall Height Grip (in) Depth (in) 765 205 154 1049 242 428 1049 242 270 2350 6727 765 159 169 1049 228 123 1049 186 198 2530 6727 148 20 22 208 19 22 208 18 22 385 896 2.0 0.3 0.3 4.0 0.6 0.6 4.0 0.6 0.6 12.0 45.0 2.0 0.3 0.3 4.0 0.6 0.6 4.0 0.6 0.6 12.0 45.0 0.8 0.1 0.1 2.0 0.3 0.3 2.0 0.3 0.3 3.5 10.0 .275 .280 .280 .400 .405 .405 .400 .405 .405 .615 1.00 .275 .280 .280 .400 .405 .405 .400 .405 .405 .615 1.00 .320 .320 .320 .500 .500 .500 .500 .500 .500 .625 .750 .320 .320 .320 .500 .500 .500 .500 .500 .500 .625 .750 #4-40 #4-40 #4-40 #6-32 #6-32 #6-32 #8-32 #8-32 #8-32 1/4-20 5/16-18 #4-40 #4-40 #4-40 #6-32 #6-32 #6-32 #8-32 #8-32 #8-32 1/4-20 5/16-18 .200 .200 .200 .375 .375 .375 .375 .375 .375 .500 .625 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a .060 .060 .060 .060 .060 .060 .060 .060 .060 .100 .100 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a .110 .110 .110 .160 .160 .160 .160 .160 .160 .260 .290 .110 .110 .110 .160 .160 .160 .160 .160 .160 .260 .290 n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a “H” after part number indicates ISOLOSS HD material. Dimensions given here are nominal. Exact specification print available on request. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies 14 • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company ISOLOSS PERFORMANCE CALCULATION GUIDE WORKSHEET TO DETERMINE ISOLATOR STIFFNESS AND NATURAL FREQUENCY The dynamic stiffness values presented in the tables on Pages 13-14 CALCULATION WORKSHEET are based on a mount temperature of 68F (20C). To determine 1. Choice of isolator 2. Weight/isolator 3. Orientation of the installed isolator 4. Dynamic stiffness of the isolator at 68F (20C) 5. Operating temperature of the application 6. Temperature correction factor 7. Multiply the dynamic stiffness value (lb/in) by the temperature correction factor 8. Calculate natural frequency using equation provided below left. whether a particular ISOLOSS HD or VL isolator has the required dynamic stiffness for a particular application, simply use the Stiffness-Temperature Correction Graph below and follow these steps. CALCULATING STIFFNESS WITH TEMPERATURE 1. Select an ISOLOSS HD or VL isolator for your application. 2. Consult the tables on Pages 13-14 to find the dynamic stiffness value for the particular isolator you have chosen. Use the value given for either axial (horizontal plate) or radial (vertical plate), depending on how the grommet will be used. For a sandwich mount, choose the value for compression or shear mounting. 3. Using the operating temperature of the application, find the temperature correction factor for the material you are considering from the graph below. 4. Multiply the dynamic stiffness value by the temperature correction factor to obtain the dynamic stiffness at the specified temperature of the application. NATURAL FREQUENCY CALCULATION EXAMPLE CALCULATION 1. Choice of isolator G-411-H 2. Weight per isolator = 3 lbs. 3. Orientation of the installed isolator Axial mount 4. Dynamic stiffness of the isolator at 68F (20C) = 1470 5. Operating temperature of the application = 86F (30C) 6. Temperature correction factor = 0.5 7. Multiply by the dynamic stiffness value = 735 lb/in by the temperature correction factor 8. Calculate natural frequency: Fn = 3.13 √ 735/3 = 49Hz 9. Refer to Pages 11 and 12 for additional isolator performance calculations. The natural frequency of a particular E-A-R grommet or sandwich mount can now be calculated by using the dynamic stiffness calculated above. STIFFNESS-TEMPERATURE CORRECTION GRAPH Fn = 3.13 √ K ÷ W WHERE: Fn = Natural frequency of the grommet (Hz) 100.0 K = Dynamic stiffness (lb/in) CORRECTION FACTOR W = Load per grommet (lb) Refer to Pages 11 and 12 for remainder of isolator performance calculations. 10.0 ISOLOSS HD ISOLOSS VL 1.0 0.1 0 5 10 15 20 25 30 35 40 TEMPERATURE (C) Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 15 I S O L AT O R I N S TA L L AT I O N H I N T S GROMMETS To meet a wide range of performance and assembly needs, E-A-R offers both one-piece and two-piece styles of grommets. GROMMET INSERTION Figure 1 One-piece grommets—ribbed and non-ribbed Here are typical methods for installing one-piece E-A-R grommets in a frame or panel. • For use in automated assembly, the preferred method of grommet installation is the straight-side or keyhole slot. See Figure 1. This method accommodates robotic assembly and is the easiest for manual assembly as well. Using this method, the grommet and the hardware recommended to optimize performance can be installed in a single step, or the hardware can be added later. See Figure 2. D = 80% of D TYPICAL ISODAMP GROMMET INSTALLATIONS Figure 2 • For manual assembly without keyhole slots, E-A-R grommets can be heated to make them more pliable. They can then more easily be pushed into position in the frame or plate. TYPICAL ISODAMP BUSHING AND RING INSTALLATIONS Figure 3 Ring & bushing Double bushing Two-piece grommets—bushings and rings For non-standard-thickness panels or frames, use of two-piece grommets (bushings and rings, or two bushings, as shown in Figure 3) can provide a major installation advantage. Two-piece grommets eliminate the need for preheating. The two pieces are installed from opposite sides to accommodate many panel thicknesses. Double bushing RECOMMENDED HARDWARE TO OPTIMIZE PERFORMANCE Figure 4 Shoulder bolt with washer Metal ferrule Plastic ferrule Lock nut FOR PRELOAD CALCULATION Figure 5 Hardware Common hardware, typically used with E-A-R grommets to mechanically limit preload, is shown in Figure 4. The hardware may include a shoulder bolt with washer, plastic or metal spacer, sleeve, or locking nuts with bolt and washers. Sleeve Optimum performance of vibration and shock is generally achieved with 5 to 10 percent preloading of E-A-R grommets, especially for ribbed styles. The ideal hardware height to obtain maximum recommended preload can be calculated from the formula Hardware Height = 0.91 (H) + 0.09(G), where H is the overall grommet height and G is the thickness of the mounting plate. See Figure 5. H G FAN MOUNT INSTALLATION Figure 6 Isolation Disk FAN MOUNTS Here are typical methods for installing ISODAMP fan mounts. • Pull one opening of the “isolation disk” into the hole in the sheet metal. Pull the fan mount into sheet metal hole in a rotational motion. See Figure 6. Repeat until all the fan mounts are in all the sheet metal holes. Figure 7 • Align all the fan holes to the fan mounts. Push the fan into the fan mounts while pulling the tip of each individual fan mount through the holes in the fan. See Figure 7. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies 16 • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company I S O L AT O R I N S TA L L AT I O N H I N T S Alternate fan mount installations Figures 8 and 9 illustrate two alternate installation methods. • Basic Keyhole: Slide fan mounts into the keyholes on the sheet metal. Align all the fan holes to the fan mounts. Push the fan into the mounts, pulling each mount through the corresponding hole in the fan. See Figure 8. • Rotational Keyhole: First pull all the fan mounts through the holes on the fan. Position the fan and mount assembly over the sheet metal. Push all the fan mount bases into the large portion of the keyhole. Rotate the assembly until it locks in place. See Figure 9. Custom design options E-A-R fan mounts can be designed with a throw-away tip that breaks away with a firm tug after the fan has been installed. See Figure 10. The force ALTERNATE INSTALLATION Figure 8: Basic Keyhole required to pull the mount through the fan holes should be less than 1.5 lbf. Keyhole Detail Break-off force for the tip is about 3 lbf. Figure 11 shows another option—a D “double Xmas tree design”— which can accommodate two different flange thicknesses. For even greater flexibility in manufacturing assembly, fan mounts can be designed for two-way pull-through installation. See Figure 12. This allows the choice of pulling the mount through either the fan holes or the sheet metal holes first. = 90% of D Sheet Metal Figure 9: Rotational Keyhole Keyhole Details = 90% of D ISOLOSS SANDWICH MOUNTS As shown in Figure 13, ISOLOSS sandwich mounts can be used to support D loads in either compression or shear, or, as in most cases, some combination of the two. Here are some installation tips to consider when installing a mount. Sheet Metal Loading conditions vs. stiffness ISOLOSS HD and VL elastomers are stiffer under compressive load than CUSTOM FAN MOUNT DESIGN OPTIONS Figure 10: Break-off Tip under shear load. Consequently, when the elastomers are used in shear, Break-off point they cannot be load-rated as highly as when used in compression. The dynamic shear stiffness generally is between 20 and 30 percent of the compressive stiffness. Thus, a mount’s natural frequency under compres- Figure 11: Double X-mas Tree sion loading is twice what it is under shear loading. Therefore, a mount can be used in static compression up to its material strength limits while providing very good isolation of lateral, or shear, vibration. Figure 12: 2-Way Pull Through Deflection in overload conditions ISOLOSS sandwich mounts are self-snubbing under compressive overload. As a mount is loaded to its design limit, the effective stiffness begins to increase, thus offsetting excessive deflection under overload conditions. By contrast, overload in the shear direction will increase shear stiffness only slightly. Consequently, shear overload is not self-snubbing. The same is true for tensile overload. This behavior makes a strong case for engineering sandwich mounts to SANDWICH MOUNT Figure 13 W be used primarily in compression, especially in cases where occasional overload or excessive temperatures may occur. As a rule, sandwich W mounts should never be used primarily in tension. If they must be used in tension or shear, however, a fail-safe design, e.g., use of a retention strap, is especially critical. Shear Lock Washer Compression Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 17 MATERIAL NOMOGRAMS & PROPERTIES C-1000 Series C-1105 11 10 30 C-1100 DEGREES CELSIUS 20 10 0 -10 -20 11 10 10000 DEGREES CELSIUS 70 60 50 40 30 20 10 -10 0 70 11 10000 10 60 50 40 30 20 100 LOSS FACTOR 8 10 (0.1) 10 10 7 1000 9 100 10 10 (1.0) LOSS FACTOR 10 1 8 10 7 1 10 (0.1) DYNAMIC MODULUS (DYNES/CM2) (LOSS FACTOR) 9 10 (1.0) 0 10000 MODULUS MODULUS 10 FREQUENCY (Hz) 1000 10 DYNAMIC YOUNG'S MODULUS (DYNES/CM2) (LOSS FACTOR) 10 FREQUENCY (Hz) DYNAMIC MODULUS (DYNES/CM2) (LOSS FACTOR) MODULUS 10 10 1000 9 100 10 10 (1.0) LOSS FACTOR 8 10 10 (0.1) 10 FREQUENCY (Hz) C-1002 DEGREES CELSIUS 70 60 50 40 7 1 VERSADAMP VERSADAMP V-2590 40 20 0 -20 -40 1000 109 (1.0) 100 LOSS FACTOR MODULUS 10 8 (0.1) 10 10 7 1 DYNAMIC MODULUS (DYNES/CM2) (LOSS FACTOR) 10000 1010 60 40 20 DEGREES CELSIUS 0 -20 120 100 80 -40 1011 FREQUENCY (Hz) DYNAMIC MODULUS (DYNES/CM2) (LOSS FACTOR) 1011 120 100 80 10000 1000 1010 MODULUS 100 109 (1.0) LOSS FACTOR 10 8 (0.1) 10 10 7 1 ISOLOSS HD VERSADAMP V-2750 DEGREES CELCIUS DEGREES CELSIUS 40 20 0 -20 11 MODULUS 100 109 (1.0) 10 8 (0.1) LOSS FACTOR 10 DYNAMIC YOUNG'S MODULES (DYNES/CM2) (LOSS FACTOR) 1000 1010 60 50 40 30 20 10 0 -10 10 10000 FREQUENCY (Hz) DYNAMIC MODULUS (DYNES/CM2) (LOSS FACTOR) 1011 -40 -20 1 10000 1) 10 10 1000 9 10 (1.0) 100 2) 3) LOSS FACTOR 8 10 (0.1) 10 7 1 10 5) Note: Downloadable versions of these nomograms are available on our Websites. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies 18 • 0 -20 -40 10000 1000 1010 MODULUS 100 109 (1.0) 10 8 (0.1) LOSS FACTOR 10 1 Reduced Frequency Nomograms The reduced frequency format is the standard method for displaying damping material performance data. To determine dynamic Young’s modulus and material loss factor at a given temperature and frequency, use the following steps. 4) 10 7 20 MODULUS FREQUENCY (Hz) 60 40 10 7 ISOLOSS HD 120 100 80 60 1011 DYNAMIC MODULUS (DYNES/CM2) (LOSS FACTOR) 60 FREQUENCY (Hz) 120 100 80 VERSADAMP V-2599 DEGREES CELSIUS DEGREES CELSIUS FREQUENCY (Hz) VERSADAMP V-2325 Select the frequency of interest on the righthand vertical axis. Follow the selected frequency line horizontally to the left until the selected diagonal temperature isotherm is intersected. Draw a vertical line up and down through the frequency/isotherm intersection, intersecting the dynamic Young’s modulus and material loss factor curves. Draw horizontal lines from these points to intersect the left-hand vertical axis. The dynamic Young’s modulus value is read using the Dynamic Modulus scale and the loss factor from the Loss Factor scale. 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company TYPICAL PROPERTIES ISODAMP ISOLOSS VersaDamp Property C-1002 C-1105 C-1100 C-8002 V-2325 V-2590 V-2599 ISOLOSS HD SL-20100 SL-25200 Description Vinyl Solid Vinyl Solid Vinyl Solid TPE Solid TPR Solid TPR Solid TPR Solid Urethane Solid Synthetic Rubber Synthetic Rubber 57 50 21 27 Hardness ASTM D2240 Shore A Durometer 23C (73F) On Impact 58 5 sec impact 15 sec impact 56 63 70 57 40 Listed V-0 Listed V-0 Listed V-0 Listed V-0 Listed HB Listed HB @ 0.072 cm @ 0.15 cm @ 0.15 cm @ 0.28 cm @ 0.32 cm @ 0.15 cm (0.28 in) (0.06 in) (0.06 in) (0.110 in) (0.125 in) Meets at Meets at Flammability UL 94 MVSS-302 Meets at Meets at Meets at (0.06 in) Meets at Meets at 0.040 cm 0.15 cm 0.32 cm 0.32 cm 0.32cm 0.32 cm 0.32 cm (0.015 in) (0.06 in) (0.125 in) (0.125 in) (0.125 in) (0.125 in) (0.125 in) FAR 25.853 (a) Appendix F Meets at Part I (a) (1) (ii) (12 sec) .152 cm (.060 in) Canadian Stds. Assoc. (CSA) Listed 0.6 V-0 Listed 0.6 V-0 0.15 cm 0.15 cm Listed 0.6 HB 0.32 cm (0.06 in) (0.06 in) (0.06 in) Compression Load Deflection kPa (psi) ASTM D575 at 0.51 cm/min (0.2 in/min) 10% kPa (psi) 490 (71) 634 (92) 1069 (155) 751 (109) 20% kPa (psi) 1682 (244) 30% kPa (psi) 3682 (534) 210 (30) 2206 (320) 3413 (495) 1530 (222) 450 (65) 4785 (694) 7122 (1033) 2440 (354) 817 (118) 551 (80) 469 (68) 565 (82) 124 (18) 179 (26) 1102 (160) 855 (124) 1241 (180) 241 (35) 352 (51) 1719 (249) 1448 (210) 2103 (305) 393 (57) 565 (82) Compression Set (%) ASTM D395 Method B 22 hr at 22C (72F) 14 23 24 18 15 15 16 4.5 3 5 22 hr at 70C (158F) *50C (122F) 62 51 55 66* 26 26 32 6.1 8 8 22 hr at 90C (194F) 30 7.9 Tensile Strength kPa (psi) ASTM D412 10852 12459 14190 7930 2620 4502 4930 8963 3653 4384 (1574) (1807) (2058) (1150) (380) (653) (715) (1300) (530) (636) 15.6 Tear Strength kN/m (lbf/in) ASTM D624 35 42 53 30 10.2 23.1 21.5 38 12.2 (202) (241) (305) (173) (58) (132) (123) (218) (69) (88) @1,000 HZ @1,000 HZ 8C to 51C 8C to 45C Temperature Range C (F) Peak Damping 13C to 41C Performance Temperature Range 27C to 54C (55F to 105F) (80F to 130F) 35C to 63C 17C to 41C (95F to 145F) (62F-105F) -40C to 50C -40C to 50C -40C to 50C (-40F to 122F) (-40F to 122F) (-40F to 122F) 13C to 41C (55F to 105F) (46F to 123F) (46F to 113F) Recommended Maximum 82C 82C 82C 80C 125C 125C 125C 107C 100C 100C Intermittent Temperature (180F) (180F) (180F) (176F) (257F) (257F) (257F) (225F) (212F) (212F) Maximum Continuous Service Temperature RoHS Compliant 70C 70C 70C 70C 100C 100C 100C 90C 70C 70C (158F) (158F) (158F) (158F) (212F) (212F) (212F) (194F) (158F) (158F) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company 19 ELASTOMER COMPARISON GUIDE E-A-R Highly Damped Materials VersaDamp V-2590 ISODAMP ISODAMP C-8002 ISOLOSS HD Other Common Materials ISOLOSS HDF Other TPE Urethane Thermoset Butyl Rubber Natural Rubber Neoprene Nitrile Rubber 18 Damping T max (dB) 7 3 3 4 4 15 4 8.6 23 20 Durometer Shore A 57 56,63,70 57 58 61 55 35 55 50 50 55 Resilience % 12 5.3 4 4.5 4.5 49 4.8 15.6 68 238 28.4 Tensile Strength PSI 653 1574, 1807, 2058 1150 1300 1348 674 225 786 1741 584 1103 Percent Elongation 344 459 754 424 424 396 400 335 776 675 669 Tear Strength Good Excellent Good Excellent Excellent Good Excellent Good Good Poor Good Poor Excellent Excellent Poor Poor Fair Abrasion Resistance Poor Good Excellent Good to Excellent Excellent Compression Set Resistance Good Fair Fair Excellent Excellent Good Excellent Fair Good Fair to Good Good Low Temperature -70C -20C -12C -27C -27C -70C -50C -50C -80C -45C -85C 125C 82C 80C 107C 107C 125C 82C 135C 121C 135C 125C Heat Aging 100C Excellent Good to Excellent Good Fair to Good Fair to Good Excellent Fair to Good Excellent Good Good Good Flame resistance UL 94 HB UL 94 V-0 UL 94 V-0 UL 94 HB UL 94 V-2 UL 94 HBF Poor to Fair Poor Poor Good Poor to Fair Injection Molding Injection Molding Transfer Molding Transfer Molding Injection Reaction Mold or Cast Molding Compression Mold Compression Mold Compression Mold Compression Mold Embrittlement Point High Temperature Max Intermittent Typical Process Method Injection Molding Bonding Poor Fair Excellent Good Good Poor Fair to Good Fair to Excellent Excellent Good to Excellent Excellent Weather Excellent Excellent Excellent Excellent Excellent Excellent Excellent Fair Excellent Good Oxidation Excellent Good to Excellent Excellent Excellent Excellent Excellent Excellent Excellent Excellent Good Good Fair to Good Ozone Excellent Excellent Good Excellent Excellent Excellent Excellent Excellent Poor Excellent Poor Water Good Excellent Excellent Good Good Good Good Excellent Excellent Good Excellent Acid Excellent Excellent Good Good Good Excellent Poor to Fair Excellent Fair to Good Good Good Alkali Excellent Good Good Good Good Excellent Poor to Fair Excellent Fair to Good Good Fair to Good Poor Good Poor Excellent Excellent Poor Excellent Poor Poor Good Excellent Poor Fair Poor Poor Poor Poor Poor to Fair Fair to Good Poor Poor Good Alcohol Good Poor Good Fair Fair Good Good Excellent Good Fair Excellent Degreaser Solvents Poor Fair to Poor Poor Fair to Poor Fair to Poor Poor Fair to Poor Poor Poor Poor Poor Resistance Data Gasoline, Kerosene, Etc. (Aliphatic Hydrocarbons) Benzol, Toluol, Etc. (Aromatic Hydrocarbons) (Halogenated Hydrocarbons) PUT E-A-R ON YOUR DESIGN TEAM Incorporating preventive measures early in a product’s development process can help sidestep unwanted noise and vibration, as well as disruptive and destructive shock energy that can affect marketability. It also can prevent the need to re-engineer, redesign or retool. Retrofitting is rarely as cost-effective as designed-in controls, and may be much more costly to implement in the long run. Assistance from an E-A-R applications engineer may entail a quick phone call, complete in-house lab diagnosis or even a visit to the customer’s site. Our NOVICON lab can effectively diagnose problems and validate our proposed solutions, utilizing state-of-the-art diagnostic and analytical tools. Vibration shakers, drop shock tables, high-speed video and a hemi-anechoic chamber are just a few of the tools commonly used. E-A-R engineers and technicians routinely consult with product designers about materials selection, design configurations, potential problems and other critical noise, vibration and shock issues while the design is still on the drawing board. We don’t supply just materials. We offer our technical expertise, applications experience and testing capabilities as well. E-A-R also utilizes the latest 3D solid modeling CAD systems—ProE, CATIA, SolidWorks and SDRC-Ideas—to examine a customer’s product during the design stage and to develop custom solutions. Electronic transfer of large files is available through our Websites. The data listed in this guide are typical or average values based on tests conducted by independent laboratories or by the manufacturer. They are indicative only of the results obtained in such tests and should not be considered as guaranteed maximums or minimums. Materials must be tested under actual service to determine their suitability for a particular purpose. Toll-free hotline (877) EAR-IDEA (327-4332) www.earshockandvibe.com www.earsc.com E-mail: solutions@earsc.com Aearo Technologies 20 • 7911 Zionsville Road Indianapolis, IN 46268 Phone (317) 692-1111 Fax (317) 692-3111 650 Dawson Drive Newark, DE 19713 Phone (302) 738-6800 Fax (302) 738-6811 a 3M company ©2005 Aearo Company • Printed 1.09 • Cat. 200
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