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Agreed, the purpose of the pin is for alignment, and not ment to be under tension. I think the problem also starts to snowball with damage to the spindle; rougher surface-less holding capacity-loose tool adds more damage- shears pin, etc.

Great idea on the reamer; I was trying to think of solutions other than grinding. Thanks.

I assume that’s the cause? Now that it’s out, I can replace the pin so this mess doesn’t happen again.

I’ll get a picture or two of the defect once I’m home tomorrow. Looks like the ideal fix is to put in a lathe, and have the inside ground; anyone have a Toolpost grinder?

Hi, I have my RF45 clone apart currently, and thought it might be a good time to address the interior of the R8 spindle; there’s some markings and rough spots on the interior. What are some options for cleaning this up? (Have a small video, but can’t seem to post). Thanks.

Thanks for the recommendations Tom, I’ll check them both out.

Wouldn’t have thought of TSL; but they certainly don’t make parts guys like they used to. I’ve got the gearbox mostly apart now; bearings shouldn’t be a problem to find, hopefully the seals are as straight forward. Good tip on the breather, .

Thanks! I’ll give them a call.

Good points, thanks Peter. I was hoping to have a source of parts before opening it up. The previous owner said it was discounted at the store, because it was leaking from new. They even had the original gallon jug of oil the store threw in for the leak. Anyways, should be a relatively simple...