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Posted by on January 24, 2008, 6:31 pm
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I am trying to thread a 3/8" diameter Tungsten metal rod on the
lathe. I have already killed a WC tipped thread tool. Anyone have
any recommendations on the proper tooling for threading this difficult
to machine metal?
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Posted by Doug White on January 24, 2008, 9:01 pm
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Keywords:
meredith.weinstein@gmail.com wrote:
>I am trying to thread a 3/8" diameter Tungsten metal rod on the
>lathe. I have already killed a WC tipped thread tool. Anyone have
>any recommendations on the proper tooling for threading this difficult
>to machine metal?
Machining tungsten is VERY difficult. It work hardens if you look at it
crosseyed, and then it gets nearly impossible to deal with. Just
drilling a hole in an "easy to machine" tungsten copper alloy requires
constant feed. If you hesitate for a second, you're screwed. I've never
tried threading it, but it might work best if you can do it in one pass.
Good luck.
Doug White
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Posted by on January 24, 2008, 10:16 pm
Please log in for more thread options Grind the threads in with a formed diamond wheel and a toolpost
grinder
Bob
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Posted by Ted Frater on January 24, 2008, 10:28 pm
Please log in for more thread options meredith.weinstein@gmail.com wrote:
> I am trying to thread a 3/8" diameter Tungsten metal rod on the
> lathe. I have already killed a WC tipped thread tool. Anyone have
> any recommendations on the proper tooling for threading this difficult
> to machine metal?
If the application of the tungsten rod will allow, Id not thread the rod
at all.
Id braze on a steel sleeve then cut the thread into the steel.
should hold up to a reasonable load.
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Posted by Ned Simmons on January 24, 2008, 11:40 pm
Please log in for more thread options On Thu, 24 Jan 2008 15:31:08 -0800 (PST), meredith.weinstein@gmail.com
wrote:
>I am trying to thread a 3/8" diameter Tungsten metal rod on the
>lathe. I have already killed a WC tipped thread tool. Anyone have
>any recommendations on the proper tooling for threading this difficult
>to machine metal?
One of the finest machinists I've ever had the privilege to work with
worked for one of my customers - a place that processes refractory
metals, including machining tungsten. He told me that he did single
point a thread on a pure W rod once, as a stunt. As I recall, he said
he had to resharpen a carbide tool after every couple passes. I know
that they used to use trichlor for coolant, and the older guys there
get kind of misty-eyed when they talk about how great it was for
cutting tungsten.
As far as I know, if threads are required in pure tungsten, grinding
is the preferred way to cut them.
--
Ned Simmons
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>lathe. I have already killed a WC tipped thread tool. Anyone have
>any recommendations on the proper tooling for threading this difficult
>to machine metal?