# Question: How do you add an O ring groove in Solidworks?

Contents

## How deep should an O ring groove be?

Cross Section & Groove Design Data

Available Cross Sections for Encapsulated O-Rings & Groove Design Data
Inch MM Groove Depth
.063±.004 1.60±0.10 .046
.070±.004 1.78±0.10 .049
.079±.004 2.00±0.10 .057

## How much should an O-ring stick out?

To provide an effective seal, the O-ring’s inside diameter (I.D.) must be smaller than the piston groove diameter, so that the O-ring is slightly stretched, fitting snugly in the groove. This stretch should be between 1%-5% with 2% as the ideal in most applications. A stretch greater than 5% is not recommended.

## How do you calculate an O-ring squeeze?

Find the o-ring’s squeeze percentage in inches by dividing the squeeze inches by the gland depth with a calculator. For example, if the o-ring’s squeeze inches are . 05 and its gland depth is 1.20 inches, divide . 05 by 1.20 to determine that the o-ring’s squeeze is about 4.16 percent.

## What are the different types of O-rings?

Some of the common types of O-ring materials include PTFE, Nitrile (Buna), Neoprene, EPDM Rubber and Fluorocarbon (Viton). Silicone and Kalrez® O-ring materials are also widely used, especially in high temperature applications.

## How do I find the right size O-ring?

The best way to size an o-ring is by measuring the CS (cross-section) and ID (inside diameter). For measuring the cross-section, it is best to use a caliper, a.k.a. micrometer. If you don’t have one available, various other sizing tools can be used to get a close estimate.

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