Steel for cross slide feed screw

[MrWhoopee]

It's 7/16ths in diameter and about 8 inches of thread

So 7/16-10 LH Acme? How much experience do you have single-pointing and do you have a follower rest?

 

[sdelivery]

Msc has 7/16-8 acme rod.
What are you using it for?

 

[TheArkBuilder]

I'm looking at options to try the technique sdelivery suggested, but cannot find 7/16ths acme rod. Would 3/8s be enough or should I try to go up to 1/2. Or stick with the original design?

 

[TheArkBuilder]

Msc has 7/16-8 acme rod.
What are you using it for?

A lathe cross slide

 

[TheArkBuilder]

So 7/16-10 LH Acme? How much experience do you have single-pointing and do you have a follower rest?

I have only cut threads a hand full of times unfortunately I do not have a follow rest

 

[woodchucker]

I'll second or third 1144 easy to work, and strong

 

[MyLilMule]

Might try this place, too.

Green Bay Manufacturing

Green Bay Manufacturing Company is a supplier of Metal Manufacturing Components such as ACME threaded rods, ACME Nuts, Threaded Rods, Steel Balls, Gears & Square Holed Sleeves.

www.greenbaymfgco.com

 

[MrWhoopee]

I have only cut threads a hand full of times unfortunately I do not have a follow rest

This is not an easy job, even for the equipped and experienced. Given that this should also be a precision thread, I would be inclined to buy one if it can be found.

If you decide to change the size, I would definitely go larger, assuming there is room. You will also have to make or buy the nut to fit.
Making a small Acme nut is even more challenging than the shaft. And remember, this will be a left hand thread. How many thousandths in one rotation of the dial? The screw/nut pitch will have to match the dial unless you want to make a new one of those too. It starts getting deep.....

Just how bad is the existing screw? A close up picture of the thread would tell a lot.

 

[TheArkBuilder]

Just how bad is the existing screw? A close up picture of the thread would tell a lot

I don't have a picture right now. I have about 2thou of play, The main issue is the thread. This is a very old lathe, and originally it was square thread and an odd size and tpi as well so I am going to make a new one of standard size and pitch using acme threads

 

[TheArkBuilder]

This is not an easy job, even for the equipped and experienced

I understand this is a difficult job but I'm trying to learn and I would like to attempt to make part from start to finish. More so as a personal challenge if nothing else