Re: [CAD_CAM_EDM_DRO] Re: Bearing Lock Nuts on 5/8 in ballscrews

Steve,

Thanks - Wise Owl is the group. Their phone number is 562-461-7574
if Mike wants to call them.

George

----- Original Message -----
From: "Steve Stallings" <stevesng@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, June 02, 2005 9:47 PM
Subject: [CAD_CAM_EDM_DRO] Re: Bearing Lock Nuts on 5/8 in ballscrews


> Try:
>
> http://www.wiseowlmagazines.com/
>
> Cheers,
> Steve Stallings
> www.PMDX.com
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "George Taylor, IV"
> <gtaylor@m...> wrote:
> > Mike,
> >
> > There is an outfit in the states that I get my ME subscription from
> who
> > has been able in the past to get me replacements for lost-in-the-
> mail
> > issues and also back issues of ME Workshop. Great people to work
> with,
> > but I can't for the life of me remember their name (have it at work)
> > give me an email at gtaylor@m... tomorrow and I will forward
> > particulars.
> >
> > George
> >
> >
> > -----Original Message-----
> > From: CAD_CAM_EDM_DRO@yahoogroups.com
> > [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of mmeyers1111
> > Sent: Thursday, June 02, 2005 7:26 PM
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Subject: [CAD_CAM_EDM_DRO] Re: Bearing Lock Nuts on 5/8 in
> ballscrews
> >
> > Marcus and John - Thanks for your insight and suggestions.
> >
> > Does anybody know where I can purchase back issues of Model
> > Engineer's Workshop or get reprints of Dick Stephen's article...
> >
> > Volume 103 (December/January 2004/2005) "Retrofitting the X3
> Milling
> > Machine"
> >
> > I found out how to order a subscription, but I can't find info on
> > getting back issues.
> >
> > Mike
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "selbyplus4" <doc@j...>
> > wrote:
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "mmeyers1111"
> > > <mmeyers1111@y...> wrote:
> > > > Hi folks...
> > > >
> > > > I'm going to turn the ends of some Rockford 5/8 inch ballscrews
> > > and
> > > > I was wondering if anybody has experience with bearing lock
> nuts
> > > and
> > > > who could comment on a few questions. The lock nut will be used
> > to
> > > > preload an angular contact bearing with a 12mm = 0.4724 inch
> > > inside
> > > > diameter that is mounted inside a bearing block. I've never
> used
> > > > ballscrews or bearing lock nuts so this is very new to me. I'm
> > > doing
> > > > this to the ends of 4 ballscrews. I'll be turning them as R-30
> > > Type
> > > > C ends (http://www.rockfordballscrew.com/semchart.htm).
> > > >
> > > > 1) I noticed that McMaster-Carr (http://www.mcmaster.com) has
> > > > bearing lock nuts in 2 different sizes that would be reasonable
> > > for
> > > > a 5/8 in screw (.391"-32 and .469"-32 ). The bearing portion
> > (non-
> > > > threaded portion) of the ballscrew shaft will be turned to
> > 0.4724
> > > > inch to accept a 12mm ID angular contact bearing. So I guess
> I'm
> > > > thinking that the .469 - 32 TPI threads would be the best
> > > choice
> > > and
> > > > the bearing should slip over the threaded portion without
> > trouble.
> > > > Does the .469 -32 lock nut sound like the most reasonable
> > choice?
> > > > Yes/no?
> > > >
> > > > 2) I noticed that the McMastrer-Carr bearing lock nut indicates
> > > that
> > > > it is `self retaining' and I don't see any bearing lock nut
> > > washers
> > > > available for it. Other nuts I've seen seem to require special
> > > > washers. Is it true that that all I need is the lock nut itself
> > > and
> > > > that a washer would play no role in making sure it stays
> > `locked'
> > > > Yes/no?
> > > >
> > > > 3) Do bearing lock nuts typically have special threads that
> > > require
> > > > a special die to cut them, or can I use my lathe to cut 32 TPI
> > > > threads with the compound rest set at 29.5 degrees? I'm
> assuming
> > > > this isn't a simple yes/no. Sorry.
> > > >
> > > > 4) Does anybody use a simpler less expensive approach to
> > > preloading
> > > > angular contact bearings on a shaft so that I don't have to
> > > purchase
> > > > special bearing lock nuts?
> > > >
> > > > 5) Can anybody suggest other/better lock nuts from other
> > suppliers?
> > > >
> > > > Sorry for the length of this folks.
> > > >
> > > > Mike
> > >
> > > Hi Mike. your answers might well lie in an article by Dick
> Stephen
> > > in issue 103 of Model Engineers workshop. Basically what you put
> > on
> > > the end of a ball screw has to be absolutely concentric with the
> > > shaft, or it will not run!. Ball screw shafts are as as hard as
> > > hades to machine as they are case hardened, firms supplying them
> > > will anneal the end for you, but at a cost, and ball screws cost
> > too
> > > much for me to dare take a blowlamp to them. What Dick advocates
> > is
> > > drilling out the centre of the shaft(which is soft), and gluing
> in
> > a
> > > spigot of user friendly EN1A leaded steel. The shaft of that
> steel
> > > then being machined / threaded, and whatever else you want to do.
> > > I have done this on my conversion of an X3 mill and it works.
> What
> > > is more, if I can do it anyone can.
> > > John
> >
> >
> >
> >
> > Addresses:
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[Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
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