Anyone stock a 14mm x 1.5 thread forming tap?

[abn]

The largest thread forming tap I find stocked locally is a 12mm...I'd prefer to form rather than cut if possible. The work is 7075 T651...I tried Balax they say 3 week delivery and 3 piece minimum at $102 each.

I'm open to any solutions, I don't know the geometry of a thread forming tap but if I can't get one from stock, I guess I'll look into making one...or give up and just cut the threads.

[precisionworks]

Have you tried these sources:

http://www.emuge.com/taps/cold.html

http://www.netap.com/default.htm



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Barry Milton

[matador]

If you're talking about HSS hand taps,they are listed at a local(nz) supplier,Trade Tools, as around $40nz each.That's about $30 US.$102US seems a bit steep.

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Hans

[Al Flipo]

Cold forming threads is not as easy as you think,it takes a lot of power. I would try this first with any availably cold forming tap before you invest $.

[garyphansen]

I have a new M28x1.5 I would part with, but I guess that will not hepl you.

Gary P. Hansen

[DR]

Thread forming taps....we've used them for years. My local dealer reps Balax so that's the brand we've used for the majority of our threading.

Just recently I made an auction purchase that included some OSG forming taps.

The OSG have a unique square-ish cross section that twists in a helix up the tap. I've found these to perform better than the Balax style. A problem with the Balax was the pressure relief groove, sometimes this will get plugged with flakes of material especially when used in soft materials.

14m x 1.5 seems to be a standard metric size. I can't imagine some of the larger tooling houses don't have them.

Regarding the 7075T6, I've done a fair amount of thread forming in it. It's a tough material and needs good lubrication to form threads.