Bearings Type? (Century JJ 70mm Optical Bypass Rollers)

[Ryan Gallagher]

What grade bearings do I need if I want to service/replace in the optical sound 70mm bypass rollers?

Found a couple that are starting to exhibit a little drag.

Existing are stamped SSR-4ZZ manufactured by NMB. There seems to be a lot to choose from in the SSR4ZZ and SR4ZZ line:

https://www.nationalprecision.com/pr...oduct-variants

Looked in all our parts locations, no spares ATM,

[Steve Guttag]

Remember, with Century...nothing is precision. That doesn't mean you can't use precision stuff but it never had it to begin with. ABEC-1 is going to be fine, particularly for something like a bypass roller. If it fits, it works.

[Ryan Gallagher]

Remember, with Century...nothing is precision. That doesn't mean you can't use precision stuff but it never had it to begin with. ABEC-1 is going to be fine, particularly for something like a bypass roller. If it fits, it works.

Thanks Steve. I was rushing out the door when I posted it the Q. I expect the answer is the same... but to use better terms after looking at parts catalog, I'm actually referring to the large and small dia "film guide roller assembly" that are part of the idle/bypass path within the optical reproducer, not the bypass rollers on the external bypass (which we lack).

I also had the thought that maybe some of the 35mm ones in the mag penthouse are the same bearing? I could maybe swap until i can service or replace the issue ones. We have no 35mm mag capacity in our CP200.

I didn't snag a picture, but to steal one from the archive for illustration. Suspect bearings in Yellow. Possibly available bearings in Green (for now).

rollers.png