Author Topic: What's the best way to cut a thread  (Read 4699 times)

Offline IJL

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What's the best way to cut a thread
« on: January 12, 2007, 03:15:15 AM »
I want to thread some stainless steel, internal and external. Any good ideas / advice? or should I just get on with it like mild steel?

TIA


Ian

Offline -=ed

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Re: What's the best way to cut a thread
« Reply #1 on: January 12, 2007, 09:05:00 AM »
What size?
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-=ed..................... \"...and in our dark despair, against our will... wisdom comes...\"

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Offline Gene_SC

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Re: What's the best way to cut a thread
« Reply #2 on: January 12, 2007, 01:25:52 PM »
Without a lathe that cuts threads, ID and OD. A good tap and die set would work...:) Just my idea.. hehe

Gene
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Re: What's the best way to cut a thread
« Reply #3 on: January 12, 2007, 03:22:28 PM »
I cut them with carbide tool bits on the Walther barrels because of the hardness of the steel, it will eat a tool steel bit before the threads are cut. I worked for Pratt and Whintey years ago on the j79 jet engine and every thing on them is stainless steel or a weldment made of stainless and the only thing that will last is a carbide tool.

Carbide tool bits made for cutting threads are not hard to find at industral supplyl house. You will also need a gauge to set the tool bit  at the proper angle and the tool post has to be at that angle also because when you cut threads you only take metal off one side of the steel when cutting them. You advance the cutter with the tool post not the cross slide feed.

Offline IJL

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Re: What's the best way to cut a thread
« Reply #4 on: January 12, 2007, 06:11:01 PM »
Thanks Rich, better get the lathe gears out then. FYI it's 22mmOD stainless tube, 2mm wall. so I doubt I could turn a tap and die, even if I found the right size!

Cheers

Ian

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Re: What's the best way to cut a thread
« Reply #5 on: January 13, 2007, 07:28:22 AM »
Rember that with a lathe you can cut any threads per inch you want if your making both parts,I did a tube that is 1 inch id with 32 threads per inch and then made the screw in plug to fit them.

The thing with taps and dies is that if you go with standard sizes you end up with real deep threads 7/8 which is close to the item you want is 9 threads per inch course of 14 threads per inch fine thread which both would be to much for the 2 mm thickness of the tubing.

Offline Big_Bill

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Re: What's the best way to cut a thread
« Reply #6 on: January 30, 2007, 02:47:00 PM »
Welcome aboard Fix,

U have only been here one day, and your trying to make everyone here feel IMPOTENT !

The size of your BARREL, and/or the size of NUTS that go on that BOLT.

Can U imagine the Air Rifle U could build in that scale ?

Have a GREAT DAY, and a BETTER TOMORROW!

Bill
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SHOOT SAFE ! - SHOOT WELL ! - SHOOT OFTEN !
Always Use A Spring Compressor ! and Buy the GREAT GRT-III & CBR Triggers, cause they are GRRRREAT !

Offline shadow

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Re: What's the best way to cut a thread
« Reply #7 on: January 30, 2007, 02:51:29 PM »
YEA thanks for making a grown man cry. I'll just take my little peashooters and go home hehehe. Ed
I airgun hunt therefore I am... };)  {SHADOWS Tunes & Camo}  airguncamo@yahoo.com

Offline CharlieDaTuna

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Hey Gene...Now
« Reply #8 on: February 01, 2007, 03:40:40 AM »
here's a guy that ought to be able to build you the "Ultimate Gun". You may need to stretch your gun wall a bit though. Give me a call when UPS drops the gun off and you get it opened up and I'll come over and help you load the pellets. Oh....and you cock it.
Bob  aka:  CharlieDaTuna
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Offline shadow

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RE: Hey Gene...Now
« Reply #9 on: February 01, 2007, 05:25:13 AM »
Watch out for airplanes when you two madmen fire that AIRCANNON off. LOL, Ed
I airgun hunt therefore I am... };)  {SHADOWS Tunes & Camo}  airguncamo@yahoo.com