"Jim Wilkins" wrote in message
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"Bob La Londe" wrote in message
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... Than I thought... hmmm maybe I can borrow one from my dad. He
has some old adjustable reamers. Maybe he has one that will cover
the 1" range. He has a set and he offered to just give them to me.
I asked him how much he paid for them and offered to pay for them
since I will use it in my business. Yeah, you can give me some
money if you want, but I only paid $25 for them. Never used the
larger ones.

Nice. Two problems solved today. And even the solution to the
solution.

I suggest you try the reamer on scrap first. Perhaps my second-hand
ones aren't sharp enough or I don't know how to use them, but they
tend to chatter.

This may help both of us:
http://www.toolfab.com/assets/downlo...grind-tips.pdf

-jsw

You are sending me email replies from a dead address.

"Actually they may not be any good to me anyway. This is going to be
a blind hole, and from what I understand adjustable reamers have a
very long taper. That just won't work."

http://imajeenyus.com/workshop/20150...er/index.shtml

I made a D reamer that opened up the shackle bolt holes in hardened
truck springs, after several failed attempts to temper it hard enough
to cut without chipping, since I was drilling freehand under the
neighbor's kid's truck. I smeared on Ivory soap to protect the
machined surfaces in the fire. Grinding the flat to sharpen it removed
the temper color so I can't tell you what it was.

I've made others unhardened ones to cut aluminum, for example a
tapered air nozzle. It doesn't seem to matter if the flat isn't
exactly on a diameter, at least when using it on the lathe.

You could grind back relief behind the cutting bevel if it doesn't cut
freely enough.
-jsw