How do you size an O-ring?
If your O-Ring is cut or has snapped we can still work it out. Measure the length and the Cross section of the ring. Then divide the length by π (3.142), this will give you the circumference. Take the Cross section from this to give you the Inside diameter.
How do you calculate O-ring groove size?
Groove Design: O-Ring Seals for Static and Non-Rotary Dynamic Applications
- Calculate the O-Ring groove dimensions. Using the table above, determine the maximum recommended gland depth for your application.
- a. For a rod (shaft) seal:O-Ring Max Groove Diameter = Min Shaft Diameter + (2 x Recommended Gland Depth)
- b.
- c.
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 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%.
How much pressure can an O-ring hold?
1,500 psi
Most o-rings are designed to operate at pressures up to 1,500 psi. At higher pressures, the material must have enough strength to resist extruding into the clearance gap. The chart shows the recommended combined limits of clearance, gap, material hardness and system pressure differential.
Are O-Rings sized by ID or OD?
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.
How many MM is a size O-ring?
17.53 55.1
Ring Size Conversion Chart
Inside diameter (mm) | Inside circumference (mm) | Ring size |
---|---|---|
17.12 | 53.8 | N |
17.53 | 55.1 | O |
17.93 | 56.3 | P |
18.34 | 57.6 | Q |
How deep should a groove be for an O-ring?
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 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 .
Why are O-rings different colors?
There are various colors o-rings come in as each color has a secret meaning to it. The colors can indicate the type of material the O-Ring is based on, set by an industry standard. The industry standard was created throughout the years based on the common color these materials shipped with.
What O-ring material is best for water?
Nitrile (Buna-N) O-rings Nitrile O-rings, which have a temperature range between -54 and 149 degrees Celsius, are suitable for use with water, petroleum oils and some hydraulic fluids.