CentexMachineShop
Aluminum
- Joined
- Jan 12, 2020
- Location
- Bastrop
I am in the process of making a new lead screw for an old lathe. It is definitely Acme 4tpi and the diameter across threads is 1.429 and the root dia is 1.156”. It seems I cannot find any specs within these measurements for an acme thread. Seems like it’s maybe supposed the be 1-7/16 acme but all literature I have goes from 1-3/8 acme to 1-1/2 acme. Any thoughts?