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What are some common measurements for retaining rings that I should be aware of?

April 26, 2017common measurements retaining Rings

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What are some common measurements for retaining rings that I should be aware of?

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Free Diameter, Axial RingsThis dimension can only be measured accurately on rings that have never been installed. Measuring free diameter on an HO ring where the lugs have been compressed (or on an SH ring where they have been expanded) will yield a false reading. Free Diameter, E Rings—Do not take this measurement on an E ring using a caliper. The correct way is to use a pin gauge that makes three-point contact with the rings prongs. Free Diameter, Inverted RingsThe standard way of measuring free diameter for an axial ring does not hold true for an HOI and SHI retaining ring. For the correct method, see the HOI and SHI specification pages in the Rotor Clip catalog. HardnessTo check hardness effectively, you must first remove any finishes from both sides of the ring. Using a properly calibrated hardness tester, take a reading on the ring with the burr side up. Compare results to those listed in the hardness tables of the catalog specification page for that ring.