I've got half shafts that have a groove with an OD of 0.988".
I checked McMaster-Carr and the closest I can find to matching this is this: https://www.mcmaster.com/91590A133/
The part has a "released in groove" dimension of 0.94". This means the ring won't release back to its non tensioned dimension.
I checked with McMaster and over a number of back & forth emails they wrote:
"This external retaining ring (91590A133) is designed to apply radial tension to the groove in typical applications. The standard design is expected to be able to open up to a 1.010” ring inside diameter and spring back to a diameter below .936”, ensuring constant contact with the standard groove of .936-.944”. Based on your application with an .988” groove, the ring will certainly be under tension. However, it will have reduced thrust capacity, as you can expect the ring to dish under load when used on an oversized groove. We do not sell any retaining rings for a 1" shaft OD with a 0.988" groove OD, however you can review the larger groove OD sizes we sell for a 1" shaft here. These would be under less tension that the 91590A133 retaining ring designed for a 0.94" groove OD. "
Those alternative rings don't look very good to me and still don't seem to accomplish McMaster's stated goal. Can anyone offer some advice?
Thanks,