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.

Please contact us to review capabilities for your application.

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