Gallery, Projects and General > How do I??

metal lathe thread dial

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bert4255:
John, I'm getting about 2 1/2 threads per inch, not even 2 1/2. how do i determine if it is metric screw or imperial
thanks

shipto:
Some pictures of the screw with a ruler lined up might help.

bert4255:
ok, it is a metric leadscrew with a 2.5" TPI

Pete.:
That would be a 10mm pitch screw. It's a big boy alright.

A large lathe like that might well have a single tooth dog clutch which would remove the need for a dial. What make is it?

bert4255:
Peter, I figured it out thanks

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