problem cutting threads in stainless 304 or 303 3

• Oct 11, 2006

1
• #2

unclesyd

Materials

Aug 21, 2002

9,819

How are you trying to cut the threads?

 

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• Oct 11, 2006

• Thread starter
• #3

PlasticRD

Mechanical

Oct 11, 2006

3

I have been cutting the threades with a die. The threads I am cutting are from 1.5" to 2" long 10-32s. If I try single pointing them I get too much deflaction..

 

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• Oct 11, 2006

• #4

unclesyd

Materials

Aug 21, 2002

9,819

You die needs to be High Speed Steel.
Make sure your die is very sharp.
Don't backtrack.
Keep going once you start.

I would try a lighter cutting fluid like Tap Magic.

http://www.tapmagic.com/

 

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• Oct 11, 2006

• Thread starter
• #5

PlasticRD

Mechanical

Oct 11, 2006

3

I am using a Greenfield die and cut them all in one shot (no back tracking) I haven't tryed Tap Magic, I really hate the smell!!, but I will try it, I have some in the shop. Thanks for the suggestion, very much appreciated!

 

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• Oct 12, 2006

1
• #6

NickE

Materials

Jan 14, 2003

1,570

You almost have to use one of the smelly (sulfur) based tapping fluids on 300 series stainless. It works better because of the EP action of the sulfur compounds.

 

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• Oct 12, 2006

1
• #7

strokersix

Mechanical

Dec 7, 2002

344

You can single point them to slightly oversize, then run a nice sharp, high quality die to finish size. You may also want to reduce the major diameter a bit so you don't have to cut off as much. Should work great.

 

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