wrote:
I've had pretty good luck with the 5C fixture for regrinding the ends
of end mills, less success with various attempts on the side flutes
using a spin index or the PYH fixture. For roughing endmills I bevel
the outer tips using the 30 degree setting to get greater depth of cut
with the easily reground part.

If you hold a ruler across the end of an end mill you can see that the
edges are slightly angled toward the center. The 5C fixture is tilted
sideways to accomplish this but sometimes I have to twist the fixture
base for a steeper angle to make the wheel clear adjacent teeth on
multiflute end and shell mills.

Jointer knives are really tricky because they burn so easily. I
sharpened them in the cutter head between the centers of a very old
Brown & Sharp cutter grinding attachment, using the end of a broken
hacksaw blade for the supporting finger.

The only cutter sharpening books I've found assume you have a Real
Tool & Cutter Grinder. The Delta is a funny mix of a large Quorn-type
head and a standard surface grinder table.

$5 each for sharp cutters isn't bad, but they aren't open nights and
weekends when we hobbyists are dulling our only 7/16" end mill on
unknown scrap steel. I'll have to get down there some time soon. Have
you been to Brentwood Machinery on 125 a few miles south of 101?
http://www.brentwoodmachine.com/Merc.../bmshome3.html

Jim Wilkins

Thanks for the reply.

I'm not familiar with the PYH fixture. What is it?

OK, "down there" to Brothers'? Looks like you're in southern NH if the
segway.com is any giveaway. I know Brentwood, and used to go there
more often when we lived in Peterborough. I get there once a year or
so now. I've got to say I liked them better when they had the trailers
full of interesting stuff. Still worth a trip, though. Brothers' I
think you'd like. They have a greater inventory than Brentwood,
metalworking only, no junk, lots of separate tooling, and the boss
there really knows his stuff. Open weekdays and Saturday mornings
(although I'd call first), but I know what you mean about needing a
sharp cutter now, not in the morning.

http://www.brothersmachinery.com/

Ever try the guy in Plaistow, Rison's I think it is? I've been by, but
never when they were open.

Also supposed to be a dealer in Tilton. I'll check it out sometime
when we're over at my wife's family's camp on Winnipesaukee.

John Martin
Cumberland, Maine