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

Well, I will have a look at kitting up a small precision
belt drive spindle that could be made in a home shop.

It would involve really careful and precise machining to +/- 0.0001".

These can be purchased ready made but can cost thousands.

Shop made the cost would be about:

$150 for a matched pair of 7205 ABEC-7 light preload angular contact
bearings
$20 for a 6204 ABEC-3 or better back deep groove bearing
$30 for an ER collet nut
$30 for steel, bearing nuts, etc.

This would be a precision light duty spindle similar to one
in a small vertical mill.

Rpm would be good to about 8,000 - 12,000 or so.


Isn't $230 a bit pricey for a home project though?
I don't want to spend the time if this costs too much.

I could consider lower grade bearings, but it would not be
up to par with typical metal cutting machine tools. High grade
bearings allow the stiffness really needed for metal cutting.

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 6:42 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO]spindle plans (was VFD Selection)


I'd really like to see a design via Leslie Watts if he can find some time
to do some cad work. I find it very difficult to break away from my
projects to do something like that so I would understand if he didnt have
time, but it sure would be great.
I remember talking about this same subject about a year ago here and if
I'm not mistaken it was with Les.

Vince