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Rod & Piston (Static) Design Guide

'Rod' & 'Piston' styled O-ring grooves are commonly used O-ring sealing configurations. This page specifically concerns static (unmoving) Rod & Piston O-ring seals.


The purpose of the tables below are to serve as a design guide for static Rod & Piston O-ring grooves using AS568 O-ring sizes*. 


* 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 about O-rings, gaskets, & custom molded parts.

Canyon Components O-Ring Static Rod and Piston Groove Design Guide with specifications for dimensions, tolerances, and sealing best practices using Kalrez®, Canrez®, Chemraz®, and Parker® O-rings.

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O-Ring Size Charts

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Static rod and piston O-ring design reference from Canyon Components for AS568 standard and custom Kalrez®, Canrez®, Chemraz®, and Parker® O-rings in critical sealing applications.
Engineering guide from Canyon Components for designing static rod and piston O-ring grooves for optimal sealing with Kalrez®, Canrez®, Chemraz®, and Parker® O-rings.

Surface Finish X: 32 RMS for liquids, 16 RMS for vacuum and gases

DASH # RANGE O-RING CROSS SECTION GLAND DEPTH (D) SQUEEZE GLAND WIDTH (W) CLEARANCE (H) GLAND CORNER RADIUS
AS568 Nominal (in) Nominal (in) Actual (in) Percent Nominal (in) Nominal (in) R1 (in) R2 (in)
-004 through -050 0.070 ± 0.003 0.050 - 0.052 0.015 - 0.023 22 - 32 0.093 - 0.098 0.002 0.01 0.005
-102 through -178 0.103 ± 0.003 0.081 - 0.083 0.017 - 0.025 17 - 24 0.140 - 0.145 0.002 0.01 0.005
-201 through -284 0.139 ± 0.004 0.111 - 0.113 0.022 - 0.032 16 - 23 0.187 - 0.192 0.002 0.018 0.005
-309 through -395 0.210 ± 0.005 0.170 - 0.173 0.032 - 0.045 15 - 21 0.281 - 0.286 0.003 0.028 0.005
-425 through -475 0.275 ± 0.006 0.226 - 0.229 0.040 - 0.055 15 - 20 0.375 - 0.380 0.003 0.028 0.005

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Technical resource from Canyon Components detailing static rod and piston groove tolerances and best practices for Kalrez®, Canrez®, Chemraz®, and Parker® O-rings.

Groove Design References

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