Wood Threading Tools

[DougD]

I read that the thread tap and die size for brooms and painters extension poles is 3/4" x 5 TPI.  All I can find in most woodworking stores is 3/4" x 6 TPI.  Does anyone know a source for the 3/4" x 5 TPI size tool set?

Thanks,

Doug

[Gilgaron]

I Googled acme thread cutting dies and stumbled across this:

 

http://www.widell.com/

 

Looks like you might have to submit a quote for one, but they appear to make acme dies.

[Jim L.]

Are you absolutely sure about the 5 tpi?  Grizzly sells a 3/4 x 6 die and advertises that it will repair your broken broom handle: http://www.grizzly.com/products/Wood-Threading-3-4-Die/G1868

[DougD]

Jim L.

I did stop by a WoodCraft shop in Portland, Or, this past weekend with the painters extension pole.  The 6 TPI die I tried would partially start to thread but then bind.  This is a metal thread which is not as loose a fit as are some broom handles.  The store rep agreed it was not the correct thread.  I believe the Grizzly 6 TPI will work for a wooden broom handle but it would move some of the threads.

Doug

[Arminius]

You might have to make sure that it is not a metric threading, depending on where it was made.   There are several inch-gauge threads that will do almost 2 revolutions and then bind with a close metric size.

[DougD]

Good point Arminius, I check on that.

Thanks,

Doug