Cutting Ball Screws?

Cutting Ball Screws?

Post by Roger_ » Fri, 01 Dec 2006 22:48:36



I'm planning on making a ball***cross slide for CNC lathe attachment.

If the ball screws are machinable, I would like to turn down and thread an
end for the bearing mounting block.  If they're not machinable, I can make a
steel shaft and attach it to the ball screw.  Just wondering if anyone
here's turned ball screws and had any tooling recommendations or other
advise.
Thanks!

RogerN

 
 
 

Cutting Ball Screws?

Post by Lloyd E. Sponenburg » Fri, 01 Dec 2006 23:29:44



Quote:
> I'm planning on making a ball***cross slide for CNC lathe attachment.

> If the ball screws are machinable, I would like to turn down and thread an
> end for the bearing mounting block.  If they're not machinable, I can make
> a steel shaft and attach it to the ball screw.  Just wondering if anyone
> here's turned ball screws and had any tooling recommendations or other
> advise.

I've not turned ball screws, but have worked on CNC equipment where the ball
screws were turned to fit bearing blocks.

I have, though, turned Acme stock to fit bearings.  Except, perhaps, for the
diameter, and the fact that the 'average' ball***won't pass through my
lathe head bore, I wouldn't think it would be too awfully challenging.

Most ball***stock is hardened -- at least case-hardened.  You might need
carbide tooling.

LLoyd

 
 
 

Cutting Ball Screws?

Post by JimInsol » Fri, 01 Dec 2006 23:56:58


Most are surface hardened, so it takes a bit of time to get through the
surface- after that no problem

Quote:
> I'm planning on making a ball***cross slide for CNC lathe attachment.

> If the ball screws are machinable, I would like to turn down and thread an
> end for the bearing mounting block.  If they're not machinable, I can make
a
> steel shaft and attach it to the ball screw.  Just wondering if anyone
> here's turned ball screws and had any tooling recommendations or other
> advise.
> Thanks!

> RogerN

 
 
 

Cutting Ball Screws?

Post by Jon Elso » Sat, 02 Dec 2006 02:19:14


Quote:

> I'm planning on making a ball***cross slide for CNC lathe attachment.

> If the ball screws are machinable, I would like to turn down and thread an
> end for the bearing mounting block.  If they're not machinable, I can make a
> steel shaft and attach it to the ball screw.  Just wondering if anyone
> here's turned ball screws and had any tooling recommendations or other
> advise.

You probably want indexable carbide tooling to cut the stuff.  It
is pretty hard, but carbide will cut it.  You might eat one point
getting below the extreme hardening on the very surface, then you
can index the point and cut the rest of the way.  Finish with a
tool-post grinder.

The other option is to anneal the ends with a torch, which will
usually make it a lot easier to turn.

Jon

 
 
 

Cutting Ball Screws?

Post by Gunne » Sat, 02 Dec 2006 03:34:39


On Thu, 30 Nov 2006 14:29:44 GMT, "Lloyd E. Sponenburgh"

Quote:



>> I'm planning on making a ball***cross slide for CNC lathe attachment.

>> If the ball screws are machinable, I would like to turn down and thread an
>> end for the bearing mounting block.  If they're not machinable, I can make
>> a steel shaft and attach it to the ball screw.  Just wondering if anyone
>> here's turned ball screws and had any tooling recommendations or other
>> advise.

>I've not turned ball screws, but have worked on CNC equipment where the ball
>screws were turned to fit bearing blocks.

>I have, though, turned Acme stock to fit bearings.  Except, perhaps, for the
>diameter, and the fact that the 'average' ball***won't pass through my
>lathe head bore, I wouldn't think it would be too awfully challenging.

>Most ball***stock is hardened -- at least case-hardened.  You might need
>carbide tooling.

>LLoyd

Ive turned the ends of ball screws. Hard shit. I cut em down to size
using an abrasive saw. Turned the ends with plenty of oil and carbide
tooling. OD grinding is better.  Though you can anneal the ends you
need to turn with a torch oft times.

Shrug

Gunner

Rule #35
"That which does not kill you,
 has made a huge tactical error"

 
 
 

Cutting Ball Screws?

Post by marc.brit.. » Sat, 02 Dec 2006 03:51:38



Quote:
> I'm planning on making a ball***cross slide for CNC lathe attachment.

> If the ball screws are machinable, I would like to turn down and thread an
> end for the bearing mounting block.  If they're not machinable, I can make a
> steel shaft and attach it to the ball screw.  Just wondering if anyone
> here's turned ball screws and had any tooling recommendations or other
> advise.
> Thanks!

> RogerN

I just got done reading this site a few days ago:
http://www.FoundCollection.com/

That page the author talks about cutting and turning down the ends of a
ballscrew.

Seems like it wasn't TOO bad and he managed a really nice press fit on
the bearing.

 
 
 

Cutting Ball Screws?

Post by Richard J Kinc » Sat, 02 Dec 2006 17:38:54


Quote:
Roger_N writes:
> Just wondering if anyone
> here's turned ball screws and had any tooling recommendations or other
> advise.

Sometimes only the threaded portion is hardened but the ends are not,
specifically to allow what you want.  If you're buying them new, then just
specify you want that type of machinable end(s).