[modeleng] Re: Replacable Tips
- From: "JESSE LIVINGSTON" <fernj1@xxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 19 Oct 2005 03:24:23 -0500
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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