I've tried them all. Lautard's toolmaker's, Gingery's "d-bit" ,
Duplex's D-bit and professionally made reamers. The only one which make
a hole sized "correctly" for a given diameter of drill rod is the
professional one. The one's I make are making holes which are too
small. I somehow have managed to make W2 shrink in heat treatment!
Or more likely, I am not honing these things correctly after I
temper them. Are there any online guides as to how to sharpen then hone
shopmade reamers? I've read that your are to hone the flat, not hone
the flat, hone a radius on the leading edge, leave the end flat, etc...
Its such a simple thing, yet I am spinning around aimlessly.
I have the Howe Gunsmithing book and am reading it. Unfortunately, I
don't have the equipment to make multiple flute tools at hand. I want
simple holes for shafts. Am I expecting too much?
For example, I would very much like to make a simple coil winder. I
would expect that the winding shaft would go through a reamed hole in a
block of aluminum. That hole should have a "close" fit.
I know could use oilite bearings for this. However, aren't they
oversize on purpose so when pressed in they constrict to the intended
shaft size? If so, I need an accurate hole in which to press them. Back
to the reamers.....

Andy