[modeleng] Re: Replacable Tips

Jesse, I took your advice long before I met you.  My
little 11 x 24 Logan would not accept Carbide tool
bits at all, so now I do as you suggest--use HSS for
all my cutting needs, the Carbide tipped ones quietly
residing in a box somewhere on the back of the
workbench.

Al Messer

--- JESSE  LIVINGSTON <fernj1@xxxxxxxxxxxxx> wrote:

> May I humbly suggest that my fellow modelers with
> our smallish lathes take
> all of their carbide tipped tooling and put it
> securely out of sight.  Our
> light duty machine tools have no business being
> forced to use carbide as
> carbide tooling is for production work and/or
> castings embedded with sand or
> hard materials.  We are not into production, or at
> least most of us are not,
> so stick with the much freer cutting HSS tool bits
> and use the carbide only
> when it HAS to be used.  Your machines will thank
> you for it by having their
> lives extended many fold.  What carbide tools I have
> were made by myself by
> silver soldering used carbide saw blade tips to
> pieces of 1/4" keystock.  I
> give my home brew tools a lot of back rake and front
> clearance so they do
> not have to push the metal off the workpiece, but
> instead, cut more like HSS
> tools.  Even then, I use the tools only when
> absolutely necessary.  Also, I
> do a lot of short run light production work and use
> HSS tooling for that
> instead of carbide.
> 
> Jesse, retired machinist in Tennessee USA
> 
> > Hi Cliff,
> > Your experience is interesting to me.
> > I also purchased a set of tipped tools from a well
> known model engineering
> > supplier but I have been very disappointed with
> them.
> > The tips are very sensitive to intermittent shocks
> such as when turning a
> > round from an irregular shaped blank.
> > Out of a set of 5 tools, each with a 3 sided
> replaceable tip, almost all
> of
> > the cutting edges have chipped off and I can no
> longer use them. I know
> that I
> > could purchase more tips at approx. 3.50UKP each
> but it seems pointless
> when I
> > can make a piece of HSS last for months.
> > Being very much a beginner at this turning lark I
> assumed that I was doing
> > something wrong, but perhaps the only thing that I
> have got wrong trying
> to do
> > the job on the cheap.
> > Regards Ken Jones in Sunny Berkshire.
> 
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