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Thread: Threading Stainless
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20th Dec 2014, 10:28 AM #1
Threading Stainless
How difficult is it to cut a thread on the end of a stainless steel rod?
Will a regular set of dies, P&N or Chinese survive it or will it blunt the die?
Following "Anorak Bob" I was considering changing some of the bars on machine handles to stainless.
…..Live a Quiet Life & Work with your Hands
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20th Dec 2014, 12:17 PM #2Senior Member
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Should be OK if you use type 303, it will cut like mild steel and not workharden.
I'm not familiar with other types.
Neil
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20th Dec 2014, 12:29 PM #3
Neil, Would 303 be your most common type or special order?
…..Live a Quiet Life & Work with your Hands
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20th Dec 2014, 12:33 PM #4Most Valued Member
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I recently used a cheap Chinese die to cut a 3/8 NPT thread on some 316 stainless. I was surprised at the result. The thread was nice, clean and well formed. I used Trefolex and backed off after each half turn.
From memory the die was carbon steel, not even HSS.
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SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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20th Dec 2014, 01:02 PM #5Most Valued Member
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If you want a reasonable (ie more than say25-50mm) length of thread, there's no way I'd cut it with a die. I'd go and buy a length of 316 allthread in the pitch I needed and weld, thread or otherwise butcher the gripping end to suit the task at hand.
Some things simply are not worth doing.....
PDW
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20th Dec 2014, 03:16 PM #6Philomath in training
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Certainly use Trefolex.
Michael
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21st Dec 2014, 10:00 AM #7Diamond Member
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Depending on what I'm doing, sometimes I will single point a thread to 90% and finish off with a die.
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21st Dec 2014, 10:14 AM #8
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21st Dec 2014, 10:38 AM #9Philomath in training
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Paste
M.
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21st Dec 2014, 09:43 PM #10Senior Member
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“……common type or special order? “FWIW, Metal Machinability comparison: http://www.engineeringtoolbox.com/ma...ls-d_1450.html
We bought a couple of lengths from a supplier in Dandenong, off the shelf not special order. Can’t remember the supplier name, but I see 303 on a few local websites.
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