How Are Rubber Materials’ Tolerances Calculated?

Rubber parts are becoming more popular for manufacturing because of their ability to deliver flexibility in a wide range of temperatures and situations. Versatility is a top benefit, but only if materials are designed correctly.rma-tolerances-example

To prevent failures of critical parts and processes, the Rubber Manufacturers Association (RMA) has developed a table of tolerances that can guide in design decisions. Tolerances rely on industry standards for a variety of processes, considering cure time, temperatures, compound registration, and more.

With help from the RMA designed table, you can easily address design questions, and not over or under design the part.

Importance of Adhering to Tolerances

Rubber tolerances allow engineers to design and create products that meet the design. Making known that you adhere to RMA-prescribed tolerances helps your customers know you are meeting their design criteria.

Understanding RMA Tolerances

RMA tolerances also give you a great place to initiate discussions with purchasers when they’re looking for specialty pieces. Rubbers at long lengths can stretch or compress easily during the manufacturing process, so tolerances for longer lengths give you a starting point so you can make arrangements for measurement techniques.

Tolerance schedules are extremely important to engineers. CGR Products’ RMA Tolerances Table shares length and width tolerance dimensions of die-cut sheets or strip, expanded, and closed cellular rubber.

You can rely on this guide to ensure adherence to RMA standards for drawing designation thicknesses of .030 inches to more than .50 inches. The guide will help assure that your parts and products meet requirements from standard through non-critical applications. It includes an example of how to calculate tolerances for a material.

Download the RMA Tolerances Sheet and keep your engineers on target and your customers satisfied.



Download Our: RMA Tolerances Sheet



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Mike Burris

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Mike Burris is in Product Development at CGR Products. A member of the CGR team for over 15 years, Mike also holds a 3M certification from its Master Estimator program and an AAB degree in Business Administration.


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