RMA Table 36 – Sponge Cross Section Organic/Silicone #1, BEC 1
Tolerances on cross-sectional dimensions of irregular and cored shapes of extruded, closed-cellular rubber. Class 1 Tolerances in the table below are recommended only for high volume, tight products, or automotive applications.
RMA Class |
1* |
2 |
3 |
RMA Dwg. Designation |
BEC1 |
BEC2 |
BEC3 |
Millimeters |
0 – 6.3 |
+/- 0.4 |
+/- 0.5 |
+/- 0.63 |
6.3 – 12.5 |
0.63 |
1 |
1.25 |
12.5 – 25 |
1.25 |
2 |
2.5 |
25 – 40 |
2 |
3.2 |
4 |
40 & Over multiply by: |
0.06 |
0.08 |
1 |
Inches |
0 – 0.25 |
+/- 0.016 |
+/- 0.020 |
+/- 0.025 |
0.25 – 0.5 |
0.025 |
0.04 |
0.05 |
0.5 – 1 |
0.05 |
0.08 |
0.1 |
1 – 1.6 |
0.08 |
0.125 |
0.16 |
1.6 & Over multiply by: |
0.06 |
0.08 |
0.1 |
*Class 1 tolerances should not be applied to softer grades of material—below 63 kPa (9psi) compression deflection.
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