Hey everyone, I've been lurking a bit and am well on my way of designing a router.

I had a question about the bearing support on a lead screw- i am planning on using Acme 1/2-10 and likely some sort of motor coupler. the question involves the method of "squishing" the support bearings using 4 nuts versus using 2 locking collars.

1. is it possible to get the locking collars tight enough against the bearings so that this source of backlash is taken out?

2.how does the screw sit with the bearings in eiher method.

the plus side of using the 4 nuts, there is no machining to do on the ends, the bad side is cost. collars, less costs- but there is machining.

any help on this would be great- i havent even thought of what size bearings to use, this might be a deciding factor.