On 8/16/2015 2:11 PM, Ed S eschwerkolt@... [SOUTHBENDLATHE] wrote:
JImI used needle thrust bearings on a 1914 13" Sears Expert, made by South Bend. Due to damage from it not having any sort of free spinning thrust washer, I had to mill the ends of the bronze bearing shells flat. Another problem with it was the thrust ring on the pulley was held in place by only two short pins 120 degrees apart. The bearing end wear had let the ring move and spin around. I replaced those with three set screws.
Essentially the whole thrust support setup had to be reworked. After it was done, with the needle thrust bearings, it was a very nice running spindle that made beautiful cuts in all directions. The needle bearings allow for zero end play on the spindle, so nothing can catch and pull the spindle toward the tailstock.
That's especially helpful when facing a piece with varying density, the cut is smoother.