How do you size an O-ring groove?
Rod Gland Seals: The o-ring OD should be slightly larger than the ID gland depth (max 2%) External Pressure Face Seals: The o-ring ID should be slightly smaller than the gland inner diameter (Gland ID) (max 5%)
How do you choose an O-ring diameter?
The O-Ring inner diameter is typically chosen to be close to the groove’s inner diameter; by selecting it to be slightly less than the groove’s inner diameter, the O-Ring will stretch and hug the groove….Home.
| Operating Point | O-Ring Stretch Value | |
|---|---|---|
| minimum | 1% | 0.01 |
| maximum | 5% | 0.05 |
| recommended | 2% | 0.02 |
How do you calculate O-ring gland fill?
Gland fill is the percentage of the gland that is occupied by the o-ring. It is calculated by dividing the cross-sectional area of the o-ring by the cross-sectional area of the gland.
How do you spec an 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.
What is the best type of O-ring?
What is the Best O-Ring Material For the Application?
- Nitrile (Buna-N) is a general purpose material suited for petroleum oils, water, and some hydraulic fluids.
- Ethylene Propylene Rubber (EPR) operates in a temperature range between -60 degrees Fahrenheit to 250 degrees Fahrenheit.
How do you calculate an O-ring squeeze?
Find your o-ring’s squeeze amount in inches by subtracting the gland depth from cross-sectional diameter with a calculator. For example, if your o-ring’s cross-sectional diameter is 1.25 inches and its gland depth is 1.20 inches, subtract 1.20 from 1.25 to determine that the o-ring is able to squeeze out a total of .
How do you calculate o-ring stretch?
How much compression should an o-ring have?
Compression should not exceed 3% of the O-ring diameter. Stretch for a smaller O-ring should not exceed 5%.