Re: HSS vs TCT

On 29 Aug 2006 04:44:56 -0700, zedbert@xxxxxxxxx wrote:

Hi all,

I've just started on Harold Halls 'Lathework - complete course'. I
bought a set of TCT lathe tools from Chronos at the weekend, cos I
didn't really have a proper set. There was a choice between the TCT and
the HSS, but reading another thread here, have I made the wrong choice?


I was also looking at MaryPoppins' tipped tools on eBay. Might they be
fun?

Cheers,

Ed

Not much fun when you have 90 of the damn things to make and Mary
bloody Poppins is making rude noises in your tabhole.

A bit of history on these tools.
Some years ago one of my customer who makes on site boring and facing
machines for the oil industry remarked that every machine went out
with 4 tipped tools and inserts but came back with none.

They had either been pinched or just lost, the problem was these tools
whilst seeming simple were costing £60 to £70 each without inserts.
I got some original tools and had special tapered tooling made for the
pockets and made jigs to hold these and made some blanks up.
They were then professionally hardened and blacked.

These were then ordered in quantities of 20 per profile to go with the
machines.

Armed with this experience I then looked for a simple holder to take a
cheap tip and made two sizes, one is a 5/8" square shank to take the
popular and cheap TPUN16 triangular tip which is used on all my own
machines and the smaller 12mm square one with the TPUN11 tip that Mary
[ or in truth Ower Gert ] offers on Ebay.

They are cheap in comparison to the branded makes like Hertel but they
are well made. The tips do fit the pockets accurately and do not
damage unused tips and edges like some that just have a slab sided
shape.

We have also though of offering the larger 5/8" shanked tools on Ebay
as well and may do a few to test the water.
I use these all the while on 4 different lathes.

..
--
Regards,

John Stevenson
Nottingham, England.

Visit the new Model Engineering adverts page at:-
http://www.homeworkshop.org.uk/
.

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