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Run versus Start Capacitors - How to tell

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Run versus Start Capacitors - How to tell stoneattic 04-18-2007
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Posted by stoneattic on April 18, 2007, 10:29 am


I have a 9" Craftsman (Sears) drill press that just smoked the motor
capacitor. I call Sears about a replacement and they want to sell me
the whole motor (of course). I'm trying to replace just the
capacitor but I don't know if it's a run or start. Here's what
labeled on the cap:

CBB60 SH
16mF +/- 5%
-25/70C
250VAC
50//60Hz
Wenling Star &Fire Capacitors Factory
E215152

The model of the drill is 137.219090 if that helps

How can I determine if it's a run or start cap?

thx


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Posted by Tony Hwang on April 18, 2007, 11:20 am


stoneattic wrote:
> I have a 9" Craftsman (Sears) drill press that just smoked the motor
> capacitor. I call Sears about a replacement and they want to sell me
> the whole motor (of course). I'm trying to replace just the
> capacitor but I don't know if it's a run or start. Here's what
> labeled on the cap:
>
> CBB60 SH
> 16mF +/- 5%
> -25/70C
> 250VAC
> 50//60Hz
> Wenling Star &Fire Capacitors Factory
> E215152
>
> The model of the drill is 137.219090 if that helps
>
> How can I determine if it's a run or start cap?
>
> thx
>
Hi,
There is no run or start specific caps. It depends where in the circuit.
Just get a same spec. cap. If you can't match it little bigger value is
OK on capacitance and voltage.

Posted by mm on April 18, 2007, 3:56 pm


On Wed, 18 Apr 2007 12:49:21 -0400, "John Grabowski"

>
>Try looking for a motor repair shop (or electric motor repair) in your phone
>book. They may only charge a few bucks to fix it.

I prefer the phone book myself, but sometimes it confuses me, like, Is
there still a Business to Business Yellow pages and would this
category be in that one.

There is also in the US yp.yahoo.com which is a lot like the yellow
pages, but when I was trying to find the major electric motor repair
store in Baltimore, that I've been to, it didn't seem to come up in
yp.yahoo.com .

Probably not necessary here, but if one can find the right kind of
store somewhere else, the Electric Motor Repair in Baltimore, even if
they are not a mail order store, if you pay them extra they'll often
be glad to put what you need in a box and ship it to you. "Extra"
might not even be that much. They have boxes, tape, pens, and they get
deliveries all the time via ups etc.

For example, not electric motors but Eliot's Hardware in Dallas isn't
mail order, or at least wasn't 14 years ago, but they'll still mail
things out if one asks. I think they charged, for an envelope of
shelf pins, 32 cents to ship them. That was the cost of the stamp.
No other shipping or handling charge. A great store.

Posted by Richard J Kinch on April 19, 2007, 1:00 am


Tony Hwang writes:

> There is no run or start specific caps. It depends where in the circuit.

You're mistaken. Please, nobody listen to that ignorance.

Posted by Big Al on April 20, 2007, 10:27 am



> > stoneattic wrote:
> > > I have a 9" Craftsman (Sears) drill press that just smoked the motor
> > > capacitor. I call Sears about a replacement and they want to sell me
> > > the whole motor (of course). I'm trying to replace just the
> > > capacitor but I don't know if it's a run or start. Here's what
> > > labeled on the cap:
> >
> > > CBB60 SH
> > > 16mF +/- 5%
> > > -25/70C
> > > 250VAC
> > > 50//60Hz
> > > Wenling Star &Fire Capacitors Factory
> > > E215152
> >
> > > The model of the drill is 137.219090 if that helps
> >
> > > How can I determine if it's a run or start cap?
> >

No normal electric motor has a 16 MF start capacitor. And, most run
capacitors are 370 volt. You can replace it with a 16 MF 370 volt run
capacitor. They are available at W.W. Graingers or Johnstone. Or, why not
try Sears parts?

Al



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