Best way to machine ball screws?

[gavztheouch]

I think I have read about every thread, tutorial and watched every youtube video on ball screw end machining there is. Now im about to start machining some screws for my laser cutter.

I was about to start by grinding of the hard casing with a bench grinder, but I reckon my 15mm diameter rolled screws will still be hard at the required 12mm dia for the bearings.

I only have a Myford MLR so carbide tips are out, so I reckon the steel rod glued into the ball screw sound like the best idea.

Has anyone got any suggestions as to the best type/number of loctite to use.

[JAZZCNC]

I was about to start by grinding of the hard casing with a bench grinder, but I reckon my 15mm diameter rolled screws will still be hard at the required 12mm dia for the bearings.

Not necceserialy If chinese origin then think you'll find there only 3-4mm of hardening.?
I've machined a few, I use indexed tipped tooling and buy tips from cutwell tools designed for cutting hard materials. They easily deal with hardening, my lathe is a bit more robust than the myford but it's only a boxford AUD so not exactly heavy duty.!!

Maybe some body's got a bit of an offcut that you could practice on.? . . . Don't think I have but will have a dig about if you want to try.?

EDIT: Opp's sorry didn't read properly didn't see the 12mm dia,yes it will probably still be hard but the hard tips will still handle the hardening on chinese screws.!!

[John S]

Problem is here that the OD at 15mm will start to become the softer core at 12mm but the roots of the thread will still be hard so it's very hard to get an even finish at the 12 mm diameter.
For 15 down to 12 I'd grind them on a cylindrical grinder, only way to get a true surface.

can you redesign and go down to 10mm ?