Heavy 10 cross feed lead screw mod.

[Mchauck01]

I’m rebuilding a 1944 H10. The cf lead screw is badly worn. It is a 7/16” X 10 LH acme screw. I can’t find a screw to match. I CAN find a 1/2” x 10 LH screw. If I bore the appropriate bushings and make a 1/2” x 10 bronze but, will the dial ratio remain constant? Please share your thoughts.

 

[Asm109]

The dial only cares about threads/inch. It knows nothing about diameter

 

[DiscoDan]

I did something similar on a Burke mill. The screw was ok but the nut was worn. I bought a new round nut from McMaster Carr, bored out the old nut and press fit the new round nut in with Loctite and a set screw.

 

[Mchauck01]

The dial only cares about threads/inch. It knows nothing about diameter

SO I guess if I keep the ratio of 10 tpi I should be ok. Thanks to you!!!

 

[derf]

I did the same thing to a 9A. Used the 1/2" screw and made a matching nut. Making the nut was easier than I thought.