Help with finding unusual sized tap

Martin,

You could try Tracy Tools

Just a thought. It isn't a K nut for supporting a bearing is it?

John

Martin, MSC has them starting at $17.59 (about 15L?) see

Have you considered making it?

As Martin(?) said, TracyTools. Page 3 of the catalogue, 10.00 GBP +

The most obvious solution, since it is of fairly large diameter, is to make some sort of jury-rigged temporary fix to allow the lathe to cut threads. Then, use a single- point inside threading tool to chase the thread. If you know someone else that has a lathe, they can probably make it in 15 minutes.

Jon

Martin

Thanks for the link; they are WAY cheaper than anyone else.

Martin.

Well, heck. I've got a tap that size but it's marked "brass" right under the size. Anybody know if a "brass" tap can be used in steel or not? It's made by Wood&Spencer, if it is usable I'd ship it off to the UK for the cost postage.

Don in Ohio

I should also mention that the one I have is a plug tap, getting a thread started may be a little difficult.

Don in Ohio

Don

Provided it's HSS or carbon still it will work ok in steel. The brass might refer to British Standard Brass, but all BSB threads are 26TPI. If the tap is definitely 20TPI then I'd be happy to accept your offer. Please send me an email so that I can send you my address. Martin.

Hi Martin,

I just happen to have a few of these. They say 7/8-20 NS. +.003 The manufacturer is John Bath Co. They are unused. They are bottoming taps with only about a 1 or 2 thread lead and they have 6 flutes.

I'm not looking to make any money on them. If it sounds like it will work for you, tell me where you are and I'll send you one.

George.

reply to:

george sagecompanies com

Sorry I can't make it.

MSC has good prices on special (UNIEF and other) taps, and WT Tool even better prices.

Can't you bore the threads on this lathe, another, or a friend's?

Yours,

Doug Goncz (at aol dot com) Replikon Research, Seven Corners, VA