CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........

on 2010-02-26 08:24:03 UTC
Annealing the end of the ballscrew first is the obvious answer.

I think someone posted this before, but here's a video on the process;


http://www.youtube.com/watch?v=dzIsR4Mg158


Roland



On 26 February 2010 00:15, david@fignoggle - IMAP <david@...>wrote:

>
> it's the interrupted cuts that also create a bit of a problem. again,
> with proper insert tooling or lots of hss grinding, the material is
> easier to cut after the threads are removed. we use a ccmt 21.51
> style/size insert and the smaller radius seems to cut better than some
> of the larger triangle/trigon inserts we've tried.
>
> to get a nice, polished finish on the journals, you can leave a thou or
> so and spin up your lathe and use sandpaper belts of a desired width.
> usually, after 400 grit, your finish will be pretty nice.
>
> hope this helps!
>
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>
>
> Steve Blackmore wrote:
> >
> > On Tue, 23 Feb 2010 16:33:39 -0500, you wrote:
> >
> > >What is this "sleeve goop" you speak of, something better than
> > threadlocker?
> > >
> > >Those ballscrews ARE nearly impossible to cut down or thread, makes a
> > good case for making yourself an inexpensive toolpost grinder. You
> > just have to cover your entire machine with plastic so you don't get
> > the grinding mess into your ways.
> >
> > I've turned and threaded ballscrews without any problems? They are only
> > usually 4140 or 4150 alloy steel or 1050 Carbon steel. You need to take
> > deep roughing cuts to get through the surface hardness with Carbide
> > insert tooling. Something like Iscar IC3028 inserts are good for that.
> > Once through the surface they are no trouble at all with normal insert
> > tooling.
> >
> > Steve Blackmore
> > --
> >
> >
> >
> > --
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Discussion Thread

Jack 2010-02-23 08:05:22 UTC Threads on a ball screw........ David G. LeVine 2010-02-23 11:27:11 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Jack McKie 2010-02-23 13:00:16 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Will Holding 2010-02-25 11:31:33 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Jack McKie 2010-02-25 13:27:33 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Steve Blackmore 2010-02-25 14:00:08 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ david@f... 2010-02-25 15:30:54 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Roland Jollivet 2010-02-26 08:24:03 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ leswatts@w... 2010-02-26 08:52:51 UTC RE: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Dan Mauch 2010-02-26 08:53:33 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Will Holding 2010-02-26 13:30:42 UTC Re: [CAD_CAM_EDM_DRO] Threads on a ball screw........ Dave Halliday 2010-02-27 22:47:30 UTC Threads on a ball screw - annealing and tempering thereof...