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

Les,

I would be interested in one. What size motor would it
be able to work with? Would it be possible to couple
it to a stationary motor to reduce the weight of the
moving part of the axis?

-Bob


--- "Leslie M. Watts" <leswatts@...> wrote:

> 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
>
>
>
>
>
>
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