RE: [CAD_CAM_EDM_DRO]spindle plans (was VFD Selection)

Hi Todd

Yes I have many spindle catalogs and have designed many
myself. As an engineer I find it a little intriguing
to put the design specs and construction methods such
that something of such great precision could be built
in a home shop without a lot of the tools professionals have.

I think it could be done though.

We may end up with another home shop machinist article here!

Les

Leslie M.Watts
L M Watts Furniture
Tiger Georgia USA
(706) 212-0242
http://www.lmwatts.com
Engineering page:
http://www.lmwatts.com/shop.html
CNC surplus for sale:
http://www.lmwatts.com/forsale.html
CNC carved signs:
http://www.lmwatts.com/signwp.html




-----Original Message-----
From: TODD BOMBACI [mailto:todd.bombaci@...]
Sent: Saturday, April 15, 2000 4:38 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Cc: TODD BOMBACI
Subject: Re: [CAD_CAM_EDM_DRO]spindle plans (was VFD Selection)


Hi Les
If you go to gilman spindles and slides you will see the same setup you are
talking about in there light duty spindle set up. They basically do the same
thing. Also the same principlas are used in all gundrilling splindles.As you
are aware of the tolerences are very critical which i am not sure the
hobbist understand.
Thanks
Todd

----- Original Message -----
From: "Leslie M. Watts" <leswatts@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, April 14, 2004 12:03 PM
Subject: RE: [CAD_CAM_EDM_DRO]spindle plans (was VFD Selection)


> Since it will take me a while (crazy with work) let
> me go over some of the design concepts now.
>
> This is a thermally stable 3 bearing system.
>
> Near the work end of the tool there are two back-to back 25
> degree angular contact bearings adjacent to each other. These
> are supplied with the inner face slightly recessed (only microns)
> such that when they are squeezed together by a retaining nut
> a specific preload occurs (5% of max dynamic load). Further
> tightening of the nut does not increase the preload once the
> faces are forced into contact.
>
> These bearings are press fit on the shaft but a push fit on
> the housing. A shoulder and bolted ring secure the outer
> bearing edge. A shoulder formed on the shaft secures the inner ring, but
> it must be of a very specific size to allow bearing removal by
> pushing on the INNER ring only (with a special tool).
>
> The shaft has a short threaded portion for the retaining nut.
>
> Moving away from the tool end the shaft necks down slightly.
> This facilitates installing the angulars since they won't have
> to be pressed all the way down the shaft.
>
> At the back end there is another reduction in shaft diameter
> to provide a shoulder for press fitting a deep groove ball
> bearing. The outer part of this bearing will be allowed to
> float, but it will be very lightly preloaded with a Bellville
> washer to prevent ball scuffing. It is secured with a retaining
> nut as well.
>
> Thats basically it except for the engineering details.
> Pretty much a standard design that has been used for eons.
>
> Les
>
> Leslie M.Watts
> L M Watts Furniture
> Tiger Georgia USA
> (706) 212-0242
> http://www.lmwatts.com
> Engineering page:
> http://www.lmwatts.com/shop.html
> CNC surplus for sale:
> http://www.lmwatts.com/forsale.html
> CNC carved signs:
> http://www.lmwatts.com/signwp.html
>
>
>
>
> -----Original Message-----
> From: Vince Negrete [mailto:vnegrete@...]
> Sent: Wednesday, April 14, 2004 10:52 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO]spindle plans (was VFD Selection)
>
>
> Les, Would it be possible to have a write-up/drawing on a site in PDF w/
> availability of a full kit?
> I'm primarily interested in design concept with exact specs/demensions to
> follow for building one from Stock.
> So far there are Several folks interested since last nights post.. :)
>
> Vince
>
>
>
>
>
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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
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