Originally Posted by stevensc
If the hole 1/2 is too small you could drill it outto 3/4, you'll only be taking off 1/8th on each side.
You'll want a lot of lubricant, and extremely sharp cutting tool... the durometer of this stuff is real low, so it sticks to the cutter! Wood augers work well for this stuff, just use an oversize bit as the hole will shrink down after its drilled.
with a lot of soap is a good lubricant...
(Taking the work hat off now...)
Edit: Does your roller have a metal sleeve in the center, you'll want to keep that... If not make sure the bolt has a smooth shank anywhere it touches the roller, without the sleeve though its not going to roll well if real soft.