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The Rubber Manufacturers Association (RMA) has developed tolerance tables with ranges to provide communication between user and provider across a wide range of industries. These are helpful when designing and producing a part. You can also consult the RMA article on factors affecting tolerances of molded rubber products.
RMA Molded Tolerances
Metric Tolerances (mm)
Inch Tolerances (in)
RMA Extrusion Tolerances
Table 12.
Summary of RMA Drawing Designations Extruded Rubber Products
Table 13.
Standard Cross-Sectional Tolerance
Table 16.
Cut Length tolerance for unspliced extrusion
Table 18.
Spliced Length Tolerances
Table 20.
Tolerances on Internal Dimensions of Mandrel-Supported Extrusions
Metric Tolerances (mm)
