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97-520 Datasheet(PDF) 46 Page - Laird Tech Smart Technology |
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97-520 Datasheet(HTML) 46 Page - Laird Tech Smart Technology |
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46 / 64 page  All dimensions shown are in inches (millimeters) unless otherwise specified. FINGERSTOCK GASKETS AND METAL GROUNDING PRODUCTS CONTACT RINGS 2.33 www.lairdtech.com 97-241 97-205 97-192 97-150 TO 156 0.040 (1.016) 0.050 (1.270) Spher. R. 0.004 (0.102) 0.340 (8.636) 0.300 (7.620) 0.030 R. (0.762) 0.090 R. (2.286) 0.030 R. (0.762) 0.030 R. (0.762) 0.080 (2.032) Sphere R. 0.080 (2.032) Sphere R. 0.050 (1.270) 0.010 (0.254) 0.200 (5.080) 0.440 (11.176) 0.080 (2.032) Sphere R. 0.080 (2.032) Sphere R. 0.030 R. (0.762) 0.030 R. (0.762) 0.050 (1.270) 0.006 (0.153) 0.380 (9.652) 0.006 (0.153) 0.050 (1.270) 0.470 (11.938) 0.530 (13.462) 0.006 (0.153) 0.050 (1.270) 0.380 (9.652) 0.530 (13.462) 0.470 (11.938) 0.006 (0.153) 0.050 (1.270) 0.310 (7.874) 0.090 R. (2.286) 0.050 (1.270) 0.310 (7.874) 0.010 (0.254) 0.090 (2.286) 0.660 (16.764) 0.780 (19.812) MALE RINGS CONTIPS® AVAILABLE 0.025 (0.635) Slot 0.075 (1.905) Pitch B I.D. SERIES PITCH SLOT ID ~~ REC. B MADE # OF HOLE FROM FINGERS SIZE STRIP 97-150 0.075 0.025 0.210 9 0.250 0.220 97-134 (1.905) (0.635) (5.334) — (6.350) (5.588) — 97-151 0.075 0.025 0.330 14 0.380 0.220 97-134 (1.905) (0.635) (8.382) — (9.652) (5.588) — 97-152 0.075 0.025 0.450 19 0.500 0.220 97-134 (1.905) (0.635) (11.430) — (12.700) (5.588) — 97-153 0.075 0.025 0.690 29 0.750 0.220 97-134 (1.905) (0.635) (17.526) — (19.050) (5.588) — 97-154 0.075 0.025 0.950 40 1.000 0.220 97-134 (1.905) (0.635) (24.130) — (25.400) (5.588) — 97-155 0.075 0.025 1.450 61 1.500 0.220 97-134 (1.905) (0.635) (36.830) — (38.100) (5.588) — 97-156 0.075 0.025 1.950 82 2.000 0.220 97-136 (1.905) (0.635) (49.530) — (50.800) (5.588) — 97-192 0.075 0.025 0.450 19 0.500 0.060 97-136 (1.905) (0.635) (11.430) — (12.700) (1.524) — 97-205 0.094 0.031 0.890 30 1.000 0.310 97-137 (2.388) (0.787) (22.606) — (25.400) (7.874) — 97-215 0.094 0.031 1.240 42 1.500 0.310 97-139 (2.388) (0.787) (31.496) — (38.100) (7.874) — 97-241 0.060 0.020 0.340 18 0.380 0.130 97-223 (1.524) (0.508) (8.636) — (9.652) (3.302) — MALE RINGS FINGERSTOCK GASKETS AND METAL GROUNDING PRODUCTS LOAD/DEFLECTION DATA PART SMALLEST LARGEST NO. DEFLECTION DEFLECTION DEFLECTION LOAD DEFLECTION LOAD DEFLECTION LOAD DEFLECTION LOAD DEFLECTION LOAD INCHES LB/FT INCHES LB/FT INCHES LB/FT INCHES LB/FT INCHES LB/FT (MM) (KG/M) (MM) (KG/M) (MM) (KG/M) (MM) (KG/M) (MM) (KG/M) 97-116 0.010 11 0.020 22 0.035 44 0.045 62 0.055 84 (0.254) (16) (0.508) (33) (0.889) (65) (1.143) (92) (1.397) (125) SAMPLE LOAD CHART FOR GROUNDING STRIPS FINGERSTOCK LOAD DATA Efficient enclosure design requires an understanding of the compression force necessary to close gasketed joints. Toward this end, Laird Technologies has developed the following charts indicating compression forces required to achieve optimum gasket performance from each of our fingerstock gaskets. Loads are expressed in “pounds per linear foot” (or as “kilograms per linear meter”). Load Tests: Bare BeCu mated against mild steel having a ground surface, roughness approx. 16 m in. (0.4 mm). DEFINITIONS: Largest opening is the height at which contact force is the minimum required for reliable shielding performance. Design height is the height which allows maximum deviation in both directions. This is recommended in most cases. Smallest opening is the smallest height which precludes damage to the gasket. SHIELDING EFFECTIVENESS Shielding effectiveness of fingerstock gaskets does not vary significantly with compression. The graph below shows finger gaskets tested at five different heights. Variation is only about 10 dB, which is typical of most fingerstock gaskets. Compression of a finger gasket beyond “design height” does not benefit performance, but can complicate enclosure design. GROUNDING STRIPS Some fingerstock products are used as grounding strips, or in other applications carrying RF current. Because these products are basically flat, their loads are expressed as a function of “deflection” rather than height. Free Position Deflection Load 97-185 97-140 TO 143 97-215 0.160 (4.064) PART NO. LARGEST OPENING DESIGN HEIGHT SMALLEST OPENING HEIGHT LOAD HEIGHT LOAD HEIGHT LOAD HEIGHT LOAD HEIGHT LOAD INCHES LB/FT INCHES LB/FT INCHES LB/FT INCHES LB/FT INCHES LB/FT (MM) (KG/M) (MM) (KG/M) (MM) (KG/M) (MM) (KG/M) (MM) (KG/M) 97-951 0.195 20 0.170 36 0.150 44 0.125 62 0.100 92 (4.953) (30) (4.318) (53) (3.810) (65) (3.175) (92) (2.540) (137) Load Height Free Position 120 110 100 90 80 70 60 50 0 10K 100K 1M 10M 100M 1G Frequency (Hz) Shielding Effectiveness vs. Compression SAMPLE LOAD CHART FOR EMI GASKETS LT-3034 Metals_catalog 10/8/04 10:31 AM Page 2.33 |
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