With my metric lathe I got the imperial 16 TPI leadscrew and half nuts, I don’t recall getting a spare apron so I don’t think that’s a problem.
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I’ve only had to cut a few imperial threads, nothing exotic just ?” or ?” or whatever, and used the LMS calculator: to set up the gears.? Came out close enough for my needs.
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IIRC cutting metric on an imperial lathe is harder.
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Of course with computer control the problem just goes away no matter what you have.
Wasn't thinking about that but st a minimum I'm pretty sure you're going to have to swap the half nut actuator shaft and maybe the apron. The nuts use a different engagement to the shaft and I don't know if the shaft will fit the Seig apron.?
I went with a electric lead screw a couple years ago. Back then it cost me a bit over 500 dollars for everything but has been great. I push buttons and can change from imperial threading to metric in seconds and also do feed in both.?
For me it was worth every penny as I do quite a bit of both imperial and metric single point threading.?
