Tolerance Table for Molded Rubber Parts

For designers and engineers, a chart to assist in establishing tolerances for molded rubber, urethane, silicone and other flexible materials. Use of tolerancing guidance ordinarily used for machined or other material is often not suitable for tolerancing molded rubber and other flexible materials (e..g. silicone, urethane, TPR/TPE), which usually require larger tolerances due to molding process limitations. SOURCE: Rubber Manufacturers Association (RMA).

Kinds of Rubber Molds (rubber molding methods)

An explanation of the different kinds of rubber molds, contrasted with plastic injection molding.

Matweb

This is one of two online material databases to help you research materials (leaves our website and opens a new tab).

UL Prospector

The second of two online material databases by the trusted name in material and product safety testing (leaves our website and opens a new tab).

GE Thermoplastics Design Guide

A venerable guide to designing thermoplastic parts. It has some applicability to design for molded rubber parts as well (leaves our website and opens a new tab).