I seem to be having difficulty setting the worm gear preload. With the end cover and shims installed, the resistance to turn changes depending upon the angular position of the shaft. For about 230-degrees, it turns smooth with no up-down play. As it rotates through the other 130-degrees, the resistance to turn builds up and then drops back off. With the end cover off, I noticed that the race moves up and down slightly while sitting on the ball bearings when turning the shaft. I placed a dial indicator on the worm gear (as perpendicular as I could get it) where the ball bearings roll, and detected about 4-mils of runout. I could also detect a very small amount of runout with the naked eye. Has anyone seen this before? Do I have any options for repair other than new worm gear and/or shaft?
Thanks,
Joel
Thanks,
Joel