Overkill?

[Bushbaby]

Hi All,
I recently bought a 1/4hp motor for my Avo Douglas coil winder as these were commonly used. I must admit (Doh!) I didn't appreciate at the time how big the one I was buying it would be (I didn't take too much notice of the grinding wheel fixed to it). Its been used as a grinder so the windings are 'dirty' to say the least. It also has a missing front bearing plate so I need to make one to retain oil. 

I think its far too big to use and I'm currently looking for an old sewing machine motor and footpedal which will also allow variable speed and negate the use of a counterpulley arrangement. My only concern here is will a sewing machine motor be too small??

Regards

Rob

       

[AlanBeckett]

I don't understand the Rating Plate Rob.
As far as I can see it does say 1/4 HP. However, it also says 3.2A which equates to 1HP.
Continuous Rating will also make it bigger, as will age - older Motors tend to be bigger because the Materials used wouldn't stand very high Temperatures.
Anyway, you can use it on your Lathes.
A Sewing Machine Motor and Foot Pedal are probably a better bet for your application.

Alan

[Bushbaby]

Hi Alan,
Thanks for your reply. Yes, I agree its better to use for a lathe (new shed in Summer so I will be up and running). Is it worth cleaning the armature or best left alone? Secondly, would you use this with a capacitance start?

Many thanks

Rob

[AlanBeckett]

How many Windings does it have? You can usually tell by counting the Terminals and measuring. A Start Winding will have a much Lower Resistance than a Run Winding.
I assume there isn't a Centrifugal switch at one end.

Alan

[Bushbaby]

Hi Alan,
It appears that the only connections are labled as T A and Z. No centrifugal switch.

Regards

Rob

[AlanBeckett]

Rob,

With one Wire on each I assume. That's not good.
If it's meant for an Application which is lightly loaded on Startup, for example a Direct Drive Circular Saw, it doesn't need a Start Winding and Capacitor, although a Run Capacitor would not be a bad idea.
Give up on it for now and get something more suitable.

Alan

[Bushbaby]

Hi Alan,
Sound advice and I'm already bidding on a Singer sewing machine motor and pedal which I think will be much more suitable. The other motor can indeed wait for another time.

Thanks

Rob