I'm replacing the buna rubber AN o-rings in my brake calipers with Viton-A rings. I have purchased V75 and V90 rings. Based on an examination of nitrile (buna) specifications, the original rings have a "hardness" of 70, i.e., approximately equivalent to the Viton V75 rings.
Anyone have any experience/recommendations with which hardness to install?
Does anybody have a spruce number for the Viton equivilent of MS28775-218 ?
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Alton DeWeese
N526RV RV7A Tip Up, IO360 180 W/Hartzel BA prop.
Flying ~950 hours since Aug 2010
N4IDH
Construction Log
?The secret of getting ahead is getting started. The secret of getting started is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one.?
Gary Van Remortal was the guy who turned me on to Viton O-rings for the calipers. He recommended the 70 durometer. [That is the rating of the original O-rings] So, from your two options, I'd say the 75 is the better choice.
Charlie
Does anybody have a spruce number for the Viton equivilent of MS28775-218 ?
Alton,
I think you've eaten to much Christmas turkey or ham. You will not find Viton O-rings from ACS. Try MSC or McMaster-Carr. Of course, you will have to buy a pack of 50. Your best hope is to buy small quantities is to get some of the surplus from the original poster. Remember to get at least 4 extras, for future replacements.
Charlie
Viton Specs
You will not find Viton O-rings from ACS. Try MSC or McMaster-Carr. Of course, you will have to buy a pack of 50. Your best hope is to buy small quantities is to get some of the surplus from the original poster. Remember to get at least 4 extras, for future replacements.
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