Quote Originally Posted by Wal View Post
One more question, the pillow blocks which house the bearings that ride on the rails - they have grub-screws that you can tighten to get a snug fit between the bearings and the rails - how tight do you go with these? Just a nip front and side?
It's a feel thing but basically until they have a slight resistance with no play.!!. . . Thou if your planning on cutting Ali then you'd be better cutting your losses now at this stage before going further and buy some profiled linear rails. These rails are not really upto it and will need constant adjustment if you want any thing like decent accuracy.