- Joined
- Dec 24, 2020
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- 1,247
It does list 28, so it would do a 12-28 for typical AR muzzle threads.Not having a 28 pitch is a deal breaker for me. My mini doesn't do 28 whick is why I have the big mini ^.^
I don't know if it applies to this machine, but it's something worth considering for gunsmith work. Years ago my father bought an imported machine that claimed to do both metric and imperial threads. When he got it, it turned out it was really a metric machine, with a metric lead screw and used conversion gears to do imperial threads. It was sort of the exact opposite of vintage U.S. machines that used metric conversion gears, but not done as well.
For common nuts and bolts type stuff he said it was fine, but when he tried to cut square threads (I think 10tpi) for a rifle barrel, the conversion was off just enough it wasn't going to work. Luckily, back then he was always signed up for the local community college adult education evening machine shop class to have access to bigger machines so one of his projects there was to make a new lead screw for the machine and he could finally cut accurate imperial threads. I would want to read some reviews by people who have used these more than the typical Amazon "Just got it and it's great" sort of reviews.