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the best thing to do miller is remove the bearing if u can if not then weld small stiches a for ex 1 inch stop let cool DO NOT QUINCH IT WITH WATER then weld another 1 inch countinue this prosseces untill complete
definatly, no matter what your welding on or near, even hardened steel, the concentrated heat can cause it to warp, and warped bearings dont go very long