Re: Quiet spindle motor?

> [I was wondering if anybody knew where I could get a 1/10 hp AC-DC
> universal motor that was nice and quiet? The Dayton spindle motor on my
> MaxNC 10-2 makes too much noise for home use, but I'd like to use it in my
> basement. Is this a function of the brushes, or the sleeve (as opposed to
> ball) bearings? I've had much bigger motors that ran much quieter- any
> suggestions? I could also use a 1/5 hp motor, for my other machine.]
>

I've got a sherline with the older AC motor, that is also on the noisy
side. Contributions seem to come from the fan, brushes, relatively low
switching rate of the control, the fairly high RPM you find on these
small machines, and the fact that they vibrate a lot more for a given
imbalance than a heavy cast iron machine would.

Could you just put it in a foam-lined plywood & plexiglass box with
isolation feet (machine-box and maybe box-table)?

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
30 Griswold Street, Cambridge, MA 02138
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