Is this good enough for a leadscrew?

[cdhknives]

Is this stock good enough to use for building a new lead screw on my 10F? I know threads are only as good and accurate as the leadscrew, but I can't see buying a high $$$ ground to the tenth acme allthread for a lathe this light duty.

I know the keyway is a problem, but I think I have a way around it. Worst case I don't get power cross feed...which I almost never use anyway.

https://www.mscdirect.com/product/details/01206184

 

[DAT510]

I can't find an accuracy listed on the MSC description. McMaster also has a couple of options.... Though one lists accuracy as 0.009" per foot and the other as 0.0006" per turn. https://www.mcmaster.com/#lead-screws/=1arqrbo The "Precision Leadscrew" appears to be about 1/2 the price of MSC.

 

[cdhknives]

If you go to the MSC catalog page it says the material is 4140 and accuracy is 0.009" per Ft max. So same accuracy spec, alloy steel @ 24-32 RC vs. 1018 at 126 Brinell for half the price. McMaster doesn't seem to offer 3/4-8 acme in alloy steel or 304SS. Both call themselves Class 2C threads.

 

[cdhknives]

Also, basically just trying to replace a gouged and rounded worn leadscrew back to about original quality...

 

[benmychree]

It would seem to be better than what you have, at the least