New restoration project! 12" Craftsman lathe.

I just can't believe that the reversing gear can't be quietened down a whole lot more. Later today I'll remove the reversing gear shifter assembly and see if I can adapt a way to add a .001-.002" shim to the bores of the two gears as well as the stud gear shaft. If it works I'll try all the change gear bores with shims. Seems like that is where most of the noise starts. Press fit bronze bushings may be another option. I also ordered another spare lead screw support bearing for the "just in case" scenario!
 
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Suprize, Suprize! It worked! What a "big difference" in noise reduction of the reversing gears and change gear noise! I used .002" shim stock in the reversing gear bores being careful to keep the width inside the width of the gear bushing and not to crinkle the shim stock or overlap the ends. Mine has plastic bearing bushings but I would think it would work just as well with Zmak bushings. I used .0025" paper bag strips to readjust the change gears. If you do this please let us know how it worked for you.

Here's the specs I used: .002" shim stock, 5/16" x 1-9/16", adjust the change gears with .0025 - .003" paper starting right gear to left.

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