Author Topic: Source for capacitor for old Wolf grinder??  (Read 1560 times)

Offline TGD

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Source for capacitor for old Wolf grinder??
« on: February 25, 2021, 11:55:59 AM »
I'm doing up an old Wolf grinder and I think the starting capacitor is gone - it runs fine but has little or no starting torque.
It is an old, square capacitor and as far as I can figure out the writing on it says 8MFD, 300AC WKO. (see pic).
I can't source a capacitor or get advice on what I could replace it with (this is 220v) - any advice please?
.

« Last Edit: February 25, 2021, 12:02:21 PM by TGD »

Offline Admiral_dk

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Re: Source for capacitor for old Wolf grinder??
« Reply #1 on: February 25, 2021, 12:23:42 PM »
Hi TGD

I see no picture, but I did Google :

start capacitor 8uf 300vac

and got rather many hits.

Best wishes

Per

Offline TGD

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Re: Source for capacitor for old Wolf grinder??
« Reply #2 on: February 25, 2021, 12:36:28 PM »
Ok, thanks.
Is 'uf' the same as 'MFD' and is 'AC' the same as 'vac' then?
This a link to the pic:
http://mccm.iwsi.ie/wp-content/uploads/2021/02/capacitor.jpg

Offline TGD

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Re: Source for capacitor for old Wolf grinder??
« Reply #3 on: February 25, 2021, 12:59:15 PM »
Also, this is a pic of the grinder (hopefully) - if anyone has a scrapped one with a spare tool-rest ...??

http://mccm.iwsi.ie/wp-content/uploads/2021/02/grinder.jpg


Online Alyn Foundry

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Re: Source for capacitor for old Wolf grinder??
« Reply #4 on: February 25, 2021, 01:35:09 PM »
Ok, thanks.
Is 'uf' the same as 'MFD' and is 'AC' the same as 'vac' then?
This a link to the pic:
http://mccm.iwsi.ie/wp-content/uploads/2021/02/capacitor.jpg

Hi TGD.

The answer is yes to both questions.

The " u " signifies the Greek letter MU and is used to denote micro. The FD is an abbreviation of the word Farad which is the unit used to denote capacitance.

The AC symbol stands for Alternating Current and these days we use the term vac. This designates the working voltage for an Alternating Current supply.

We have just been given a very large Wolf grinder to play with but it appears to be on at least 40 a day, I might be able to let you have the tool rests if they're suitable.

Cheers Graham.
« Last Edit: February 25, 2021, 01:38:57 PM by Alyn Foundry »

Offline Bluechip

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« Last Edit: February 25, 2021, 02:06:52 PM by Bluechip »

Offline Don1966

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Re: Source for capacitor for old Wolf grinder??
« Reply #6 on: February 25, 2021, 04:14:33 PM »
Being 8 mfd indicates it a run capacitor not start. My grinder has a run cap in it. If it’s a can type it’s oil filled and an indication it’s a run capacitor. They are ready available and the value does not have to be exact. A 7 mfd to 10 mfd will do.
Just make sure the voltage rating is above 240 volts since your grinder runs on 240...

Regards Don
« Last Edit: February 25, 2021, 04:18:39 PM by Don1966 »

Offline TGD

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Re: Source for capacitor for old Wolf grinder??
« Reply #7 on: February 25, 2021, 07:06:34 PM »
Being 8 mfd indicates it a run capacitor not start. My grinder has a run cap in it. If it’s a can type it’s oil filled and an indication it’s a run capacitor. They are ready available and the value does not have to be exact. A 7 mfd to 10 mfd will do.
Just make sure the voltage rating is above 240 volts since your grinder runs on 240...

Regards Don
Thanks everybody.
Basically, I have very little knowledge of this stuff and, as it has very little starting torque (I can hold it stopped with my hand quite easily) but it has a lot of power when running, I presumed it is just a starting capacitor. Is there such a thing as a 'start-run' capacitor.

Offline TGD

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Re: Source for capacitor for old Wolf grinder??
« Reply #8 on: February 25, 2021, 07:11:02 PM »
Ok, thanks.
Is 'uf' the same as 'MFD' and is 'AC' the same as 'vac' then?
This a link to the pic:
http://mccm.iwsi.ie/wp-content/uploads/2021/02/capacitor.jpg

Hi TGD.

The answer is yes to both questions.

The " u " signifies the Greek letter MU and is used to denote micro. The FD is an abbreviation of the word Farad which is the unit used to denote capacitance.

The AC symbol stands for Alternating Current and these days we use the term vac. This designates the working voltage for an Alternating Current supply.

We have just been given a very large Wolf grinder to play with but it appears to be on at least 40 a day, I might be able to let you have the tool rests if they're suitable.

Cheers Graham.
Hey Graham, it would be great if I could buy a tool-rest - one would be fine. It would fit on one of those two bars sticking out the front - it is hexagonal, 15mm across the flat.

 

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