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.