Re: Spindle speeds for Geometric threading?

Jon Anderson <janders1957@xxxxxxxxxxx> wrote in news:K4mdnYP5T_1AC7reRVn-
1w@xxxxxxxxxxx:

> I'm bidding some parts that will finally let me use the 5/16 Geometric
> head I scored several years ago. Have to run a 1" and 2" long 5-40
> thread on 303SS.
>
> The thread will be a 2nd op on my manual chucker. Lathe has no coolant,
> I planned to keep a brush full of MolyDee just ahead of the chasers.
> Can anyone suggest a reasonable starting point for rpm? And better yet,
> reference to a chart of speeds would be nice. I've googled some and not
> come up with any such data.
>

30 SFM from Cutdata. You can usually pick up the books cheap. I have an old
MSDOS version. They have a nifty windoze version now or you can pay to look
it up on their web site.

http://www.cutdata.com/


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Dan

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