Is a geared leadscrew threading attachment available for the Unimat 3. ?I imagine one could be built if it is not redilly available.

Dick

I have seen plans for making a geared threading setup for the U3 from scratch and also plans for adapting a Sherline threading setup to the Unimat 3.? I just looked at the Unimat 3 files from the Unimat 3 group on groups io and found the Sherline to Unimat 3 conversion.? I have not taken the time yet to seek out the build it yourself threading set.? The only thing I remember about it was you cut your own gears and they were quite large, probably module 1.? Happy machining!

Addition to the last message.? The do it yourself threading attachment file is in the Unimat 3 group file section, listed under Other Files,? as Threading Attachment Made on the Unimat 3. Happy Machining !

I have one made for the job. It uses simple gearing to get metric pitches down to 0.5 mm. It would need substantial modification to get finer pitches or inch threading in tpi. It works using a crank handle on the spindle, rather than being motor driven.

The gears for the Basic lathe use 17 tooth gears to get close enough to inch pitches, but not many of them. If you have definite pitch requirements check that you can get them with whatever gearing you choose. There are clever ways to get inch pitches on metric lead screws and vice versa, and more obscure things like Mod and DP pitches, without using large gears like 127 tooth.

The U3 uses 1 Mod gears which are easy enough to get. The Basic uses 0.75 Mod, which are quite difficult to find.

Keith

开云体育

Dick,

Look in the files section for:

unimat3 threading attachment.pdf

Uni 4 threading attachment.pdf?

They are both the same. A hand cranked threading solution for the U3.

?

Brian In Spokane, WA USA

2nd try