Rod (Dynamic Rotary) Design Guide

'Rod' styled O-ring grooves are commonly used dynamic rotary O-ring sealing configurations. This page specifically concerns dynamic (moving) rotary Rod O-ring seals.

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The purpose of the tables below are to serve as a design guide for dynamic rotary Rod O-ring grooves using AS568 O-ring sizes+. 

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Please see our General Groove Guide for more information, or feel free to get in touch with our engineers if you have any questions. 

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*Feet per minute = 0.26 X Shaft Diameter (inches) X rpm

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**Total indicator reading between groove OD, shaft, and adjacent bearing surface

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*** If clearance (extrusion gap) must be reduced for higher pressures, bearing length M must be no less than the minimum figures given. Clearances given are based on the use of 80 shore durometer minimum O-ring for 55.2 Bar (800 psi) max. See Figure 3-2 for recommended clearances when pressures exceed 55.2 Bar (800 psi).