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machining 2 BA thread

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Andrew Johnston04/03/2016 19:30:39
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7061 forum posts
719 photos

If you can't easily cut a 2BA thread change to 3/16" by 32 or 40 tpi. Taps are readily available and so are threading inserts that will give the proper Whitworth thread form.

Andrew

Ajohnw04/03/2016 20:12:03
3631 forum posts
160 photos

Michael came up with the best suggestion really if there is a die about. You could probably screw cut to 90% plus depth and the die will still correct it.

John

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Tim Stevens06/03/2016 14:02:18
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1779 forum posts
1 photos

Have you neglected the option of using 2BA studding?

Or changing the thread to 3/16 BSF which is so near you would never notice?

Tim

Mike06/03/2016 14:21:05
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713 forum posts
6 photos

Tim, you beat me to it. I'd have substituted 3/16BSF - in fact, I'd been thinking about it since this thread started.

JasonB06/03/2016 16:31:56
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25215 forum posts
3105 photos
1 articles

I'd hate to think what that beam engine will run like with a piston rod made for studdingdevil

The fact the kits come with matching 2BA lock nut is also a reasom most stick with 2BA and beginners won't have 3/16" BSF taps for the piston and crosshead

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