Molded Rubber Tolerance Chart Rubber Molding Tolerances
Fixed Dimension = Independent dimension not calculated from other reference dimensions.
Closure Dimension = Largest outside dimension and additional outside dimensions on the same part.
Tolerance levels typically impact cost due to increased processing time and higher reject rates.
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COMMERCIAL GRADE ( Standard ) CUSTOM MOLDED TOLERANCES RMA-A3 (INCHES) | PRECISION GRADE CUSTOM MOLDED TOLERANCES RMA-A2 (INCHES) | HIGH PRECISION GRADE CUSTOM MOLDED TOLERANCES RMA-A1 (INCHES) | ||||
---|---|---|---|---|---|---|
Fixed Dimension | Closure Dimension | Fixed Dimension | Closure Dimension | Fixed Dimension | Closure Dimension | |
0.00 to 0.39 | +/- .008 | +/-.013 | +/- .006 | +/- .008 | +/- .004 | +/- .005 |
0.40 to 0.63 | +/-.010 | +/-.016 | +/- .008 | +/- .010 | +/- .005 | +/- .006 |
0.64 to 0.99 | +/-.013 | +/-.020 | +/- .010 | +/- .013 | +/- .006 | +/- .008 |
1.00 to 1.59 | +/-.016 | +/-.025 | +/- .013 | +/- .016 | +/- .008 | +/- .010 |
1.60 to 2.49 | +/-.020 | +/-.032 | +/- .016 | +/- .020 | +/- .010 | +/- .013 |
2.50 to 3.99 | +/-.025 | +/-.040 | +/- .020 | +/- .025 | +/- .013 | +/- .016 |
4.00 to 6.29 | +/-.032 | +/-.050 | +/- .025 | +/- .032 | +/- .016 | +/- .020 |
> 6.30 Multiply Dimension by 0.5% = Fixed |