How to prevent grub screws from damaging outer diameters

[Frank S]

I have found several instances where 2 grub / set screws were used in the same hole most likely to insure positive locking.
one such time one of my guys was trying ot disassemble something I noted him really wailing away at a set collar on a bearing nothing was moving and the large expensive bearing was at the verge of being destroyed with 2 hydraulic jacks pushing against the mounting flange a 6 lb shop hammer and a large brass drift and still no movement. I asked him did you take out all 6 set screws? he said I loosened all of them off a couple of rounds. Well take them out and check to see if there are screws under them. Sure enough there were 6 more 5/8 11 3/4" long, pointed set screws once those were removed the bearing could be slid off by lightly tapping around the inner race . The 8" diameter shaft had 6 drilled location holes in it