stainless thread cutting issues?

[GrahamGKD]

die guide. you can also have , guide die stock handles , that is a die holder that adjusts down to the rod to be threaded

Aha, yes, like this one (from the states, unfortunately).

 

[dan.taylor.1]

That's given me an idea, I've got some 1/2" bore pipe that fits over the round bar, I'm going to make a sleeve and clamp set up to fit over my die stock so it keeps the round bar perpendicular to the die by holding it in the sleeve.

Will be accurate enough for what I need, and more accurate than I'm getting currently anyhow!

Dan

 

[Ed.]

I would have thought you need one of those collet type things you put the die into to start it square and hold it square when you cut the thread - hopefully someone knows what they are called? You fit the die into the collet and then the collet goes into a larger sized die stock?

Edit:
Like this baby:

This idea is much better than the way I was doing, I will have to make a set. Thanks.

 

[GrahamGKD]

That's given me an idea, I've got some 1/2" bore pipe that fits over the round bar, I'm going to make a sleeve and clamp set up to fit over my die stock so it keeps the round bar perpendicular to the die by holding it in the sleeve.

Will be accurate enough for what I need, and more accurate than I'm getting currently anyhow!

Dan

Great - glad you have found a solution. You might have to think about cutting some gaps to let the chips escape or otherwise back it off and clear it from time to time - I guess that depends on how many you have to do and how long the threads are.

 

[Jester]

You could try starting the thread with a 14mm die, which will have a similar pitch to bsw - not identical but should be close enough to start for a couple of turns. This would cut a very shallow thread, which the bsw die would follow .............. possibly??????

 

[normspanners]

Good idea, I have used this principle before but the other way when taping for helicoils they can be a little hard to start square (possibly because they are more of a second cut for repairing blind holes?) in difficult areas in an engine bay etc and some times the standard tap will just give the little start required, that allows you to just wind the correct tap in.
Especially when using a tap wrench on the end of a long 3/8 extension .

 

[dan.taylor.1]

I'll have a look for my m14 x 2 die and see.

Cheers, Dan