Re: Ball screw/nut repair

Thanks Dave, I will have to pull them and
see what size they are.

Scott




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "David A. Frantz"
<spinwizard@...> wrote:

>
> For angular contact bearings for ball screw usage your best bet is

to go

> to the nearest city and find the bearing / industrial supply houses.
> One outfit that covers most of the country would be Kaman Industrial
> Technologies (www.kamandriect.com). There are of course many others
> and a local supplier may offer better deals.
>
> The things to consider are the bearings part number and manufacture.

A

> good bearing supplier should have reasonably good luck with just this
> info. It never hurts to dimension the bearing before placing an

order

> and that info may be needed for really odd suppliers. Many times
> though the part numbers cross to industry standard numbers. All of
> this if they used standard angular contact bearings.
>
> Some manufactures also make bearings designed especially for ball screw
> use. These apparently designed to take thrusts better that the

run of

> the mill angular contact bearing. If your machine has these you will
> want to make sure that you put in the same thing. It might also make
> sense to upgrade if not.
>
> If you need to look into this more check out the web sites of FAFNIR

and

> other companies. FAFNIR's web site sucks for navigation but I
> successfully downloaded their catalogs the other day at work. Of
> course there are about a billion other suppliers, but I'd suggest that
> this is the one place where cutting corners never works out.
>
> Best of luck
> Dave
>
>
> Polaraligned wrote:
> >
> > Express Ballscrew Repair quoted me $700 to $800 EACH and that
> > was on the low side he said. I made it clear that the ballscrews
> > were not crashed and that I had a couple of thousands backlash. I
> > also told him that they were in a hobby machine and I did not need
> > the typical rush turnaround service. But the guy really did not want
> > to do it. He kept telling me that there were so many made that I
> > probably could find NOS screws somewhere??? I passed.
> > 3 other firms quoted me about $750 EACH for a regrind and reball.
> > One guy wanted $200 just to reball them.
> > Finally I found Esco Machine in Texas. The guy has been doing
> > this for 30 years and knew the machine. He said he could
> > give the ballscrew a light grind and reball for $700 for BOTH.
> > What a difference. I am going to send mine out in a week or
> > two and have him do my screws. :-)
> >
> > My angular contact bearings are worn and need replacing. Anyone
> > know of a good source for this type of bearing?
> >
> > Scott
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>, "Mark Vaughan" <mark@>
> > wrote:
> > >
> > > Can I ask what sort of price they charged.
> > >
> > > I have seen quotes to regrind Bridgeport ones at £400 to £800
> > >
> > > Always seemed a hell of a lot of money
> > >
> > > Always been lucky and had good screws on everything I've aquired.
> > >
> > > Regs Mark
> > >
> > >
> > >
> > > Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
> > >
> > > Managing Director
> > >
> > > Vaughan Industries Ltd, reg in UK no 2561068
> > >
> > > Water Care Technology Ltd, reg in UK no 4129351
> > >
> > > Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> > > Phone/Fax 44 1872 561288
> > >
> > > _____
> > >
> > > From: CAD_CAM_EDM_DRO@yahoogroups.com
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > > [mailto:CAD_CAM_EDM_DRO@yahoogroups.com
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>] On Behalf Of Mark

Kenworthy

> > > Sent: 04 February 2007 20:56
> > > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > > Subject: RE: [CAD_CAM_EDM_DRO] Re: Ball screw/nut repair
> > >
> > >
> > >
> > > That's good to check. I agree, with .008" of play, the thrust

bearing(s)

> > > are almost certainly bad.
> > >
> > > If you do need your ball screw reground, I've sent 4 ball screw
> > assemblies
> > > from my Fadal mills to Express Ball Screw Repair
> > > (http://www.expressb <http://www.expressballscrewrepair.com
> > <http://www.expressballscrewrepair.com>>
> > > allscrewrepair.com), and had good results. You might
> > > want to give them a try. It's not an inexpensive process, but

much less

> > > expensive than buying new ball screws (at least for the Fadal

mills).

> > >
> > > Mark
> > >
> > > _____
> > >
> > > From: CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > > DRO@yahoogroups.com <mailto:DRO%40yahoogroups.com>
> > > [mailto:CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > > DRO@yahoogroups.com <mailto:DRO%40yahoogroups.com>] On Behalf Of
> > Vince Endter
> > > Sent: Sunday, February 04, 2007 12:09 PM
> > > To: CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
> > > DRO@yahoogroups.com <mailto:DRO%40yahoogroups.com>
> > > Subject: [CAD_CAM_EDM_DRO] Re: Ball screw/nut repair
> > >
> > > I forgot to check the angular contact bearing when I had it apart. I
> > > will check that Monday.
> > >
> > > Vince
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
>