O-Ring Piston Seal Groove Calculator
Check a static or reciprocating piston seal groove for any AS568, JIS, metric or custom O-ring
In a piston seal, the O-ring sits in a groove on the piston and seals against the cylinder bore. Use this calculator to check a static or reciprocating piston seal groove for any AS568, JIS, metric or custom O-ring size.
* Please note that some AS568-0XX O-rings have atypical cross sections. Please see our General Groove Guide for more information, or feel free to get in touch with our engineers if you have any questions.
What this calculator checks
Choose an O-ring by size standard and size code, select static or dynamic (reciprocating), and enter the bore diameter, groove diameter, groove width and piston diameter. The calculator returns groove depth, clearance, stretch, interference, compression ratio and gland fill, with our recommended range beside each result.
How to read the results
Compression ratio is how much the O-ring cross section is squeezed between the groove and the bore. Gland fill is how much of the groove the O-ring takes up; leave room for swell and thermal expansion. Stretch matters most on pistons, because the O-ring is stretched over the groove; too much stretch thins the cross section and reduces compression. Moving seals use lighter compression than static seals, so the recommended ranges change when you switch between static and dynamic.
Before you finalize a design
Check the result against the matching design guide, and ask us if the piston moves fast, the pressure is high, or the fluid is aggressive. Those conditions can call for backup rings or a different compound.
Canyon Components O-Ring Groove Calculator for piston seals with AS568 standard and custom groove dimensions for Kalrez®, Canrez®, Chemraz®, and Parker® O-rings.
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
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