"Jim Wilkins" wrote in message
news
"Howard Beel" wrote in message
news

"Jon Elson" wrote in message
news
Howard Beel wrote:


I have found that most slitting saws have some runout and usually need
a touch up when mounted in the arbor. For some reason there always
seem to be a few teeth that are higher than the rest. Some of the
blades
i indicated were 15 thou out of round and i sent them back to the
vendor.
After mounting the saw in the mill i indicate it and mark the high
teeth
then use a dumore tool post grinder to knock down the high teeth.
I like the peterson expanding flush mount arbors and robbjack arbors.
Yes, I can certainly hear the runout as a zing-zing-zing as the spindle
rotates. It doesn't seem to hurt the operation or affect surface finish
much in the groove. So, I just live with it.

My guess is these things are punched out of blanks, rather than machined
and
sharpened on an arbor.

Jon

It would be intresting to how the saws are made. Since they are made of
HSS
i don't think they are stampings. Maybe the hardened blanks are stacked
and
ground on a specialized cnc grinder, grind a bunch of the same size saws
all
at once?

Best Regards
Tom.

I turned and milled the shank end of a 3/8" HSS drill bit into a 1/4" hex
with retention groove to snap and lock into an extension shaft. It cut
easily with HSS tooling.
-jsw


All the HSS drills i have run into have soft shanks. Only the flutes are
HSS.
My collection of big drills were originaly 4 and 5 MT that i purchase cheap
because there is no hobby market for them. Generaly you can buy them at
industrial auctions for scrap prices. Just turn down the shanks to size you
need. I use a collet chuck to hold them so the shanks don't mungged up.

Best Regards
Tom.


---
This email has been checked for viruses by AVG.
http://www.avg.com