Which change gear to use.

[Ilyessa]

I was recently given a Chizhou HQ400/3. Was helping an old friend clean out a shed.
My question is dose anyone know where I can find a chart,table,book that tells me which change gears to use to cut threads.

Thanks.
Ilyessa.

 

[ddillman]

if you figure out what thread pitch the lead screw is someone here will be able to figure out the math. I'm not that smart

 

[benmychree]

If you know the leadscrew pitch, likely the gearing would be the same as any other similar lathe with the same pitch leadscrew; no math necessary.

 

[markba633csi]

You might take a look at the Smithy brand documentation, they look similar
-Mark