On Sun, 30 Jun 2019 06:36:45 +0700, John B.
wrote:

On Sat, 29 Jun 2019 19:18:24 -0400, Ed Huntress
wrote:

On Sun, 30 Jun 2019 05:08:58 +0700, John B.
wrote:

On Tue, 25 Jun 2019 06:00:58 -0500, Pete Keillor
wrote:

On Mon, 24 Jun 2019 21:36:03 -0400, "Jim Wilkins"
wrote:

wrote in message
...
On Friday, June 21, 2019 at 4:20:05 PM UTC-4, Joseph Gwinn wrote:


The key is to use SHARP HSS tools intended for plastic,

Joe Gwinn

I understand that one can buy HSS inserts that fit in the tool
holders for carbide. But I can not locate a source. Any one know
where one can buy them?

Dan
---------------------------------------

https://littlemachineshop.com/info/inserts.php

Arthur R. Warner. https://www.arwarnerco.com/Default.asp

I don't want to get into any arguments but I grew up and did my
apprenticeship in the High Speed Steel days and I must say that the
way we were taught to grind high speed tool bits resulted in a
substantially different tool than what I see used with "insert" type
tool holders which I suspect might be better for turning something
like plastic.
http://www.steves-workshop.co.uk/tip...olgrinding.htm
https://www.youtube.com/watch?v=hrDr4rYLiAk

Hi John. HSS indexible inserts are available. Even Amazon has some.
I've seen them offered with or without a chip groove and, IIRC, with a
moderate amount of relief or no relief.

Granted, those variants were things I saw years ago, but I think
you'll find that a few different types are offered, and some look
exactly like typical carbide inserts.

Probably true as I've been totally out of the trade since 1972 and
when I left we were still using HSS. In fact, thinking back, I can
remember only one time we used a carbide tool to turn something and it
was a hard valve insert in some sort of special valve and the HSS just
wouldn't make a compete cut. (Damn! that was nearly 50 years ago :-(

But I think if I were to buy a hobby lathe today I'd still go for HSS
if for no other reason than it lets you grind all sort of special bits
for various projects. Back in the day a machinist would probably have
ten or a dozen tool bits in his tool box that he had ground for some
sort of special project over the rears.

And, if there was a bench grinder in the shop you never had to worry
about dull tools :-)

I use a lot of HSS or Stellite tooling in my hope shop. I do have
carbide for nasty work...but hardened 4130 is not something I turn
often.

__

"Poor widdle Wudy...mentally ill, lies constantly, doesnt know who he is, or even what gender "he" is.

No more pathetic creature has ever walked the earth. But...he is locked into a mental hospital for the safety of the public.

Which is a very good thing."

Asun rauhassa, valmistaudun sotaan.


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