Originally Posted by Davey
A couple of points are coming to light here, firstly the question of the correct taper, I'm using Granada uprights and I'll check them for the taper before I go reaming anything out. Secondly is a comment someone made about using a reamer, you do not use it like a tap. You should never turn a reamer backeards as it blunts the cutting edge. With a tapered reamer you simply lift it out of the hole every so often while turning it forwards.
whilst i agree with what you say it is a known practice to run reamers backwards in some situations doing so can give a tighter hole size especially if the reamer is new and could cut oversize due to being too keen obviously you need to know what your doing so unless your an experienced engineer dont try it at home