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(It was) Urgent Capacitor Help (but now it's sorted)

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Forum topic by 404 - Not Found posted 483 days ago 846 views 1 time favorited 18 replies Add to Favorites Watch
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404 - Not Found

2544 posts in 1568 days


483 days ago

Thought I could smell burning yesterday, went to turn on dust extractor this morning to find the capacitor is fried. There’s all stuff coming out of it.
Sourced a replacement but it won’t ship for a fortnight, I need the dust extractor more than the bandsaw at the moment, I’m thinking can I borrow the one off the bandsaw for a couple of weeks to get me by?

Burnt out one 12uf – has runtimes for 420Vac and 470Vac

One in the bandsaw 10uf – has runtime for 450Vac

Will it work or will I just wreck the one in the bandsaw? Does anyone know? I’m really in a pickle without the DE

Thanks in advance for any guidance you can give me


18 replies so far

View JoeinGa's profile

JoeinGa

3094 posts in 605 days


#1 posted 483 days ago

Maybe you could match it up at Radio Shack?

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View waho6o9's profile

waho6o9

4747 posts in 1175 days


#2 posted 483 days ago

I’d use the one from the band saw and see no problem with using it.

I’m not an electrician, but was told that if you’re with in 10% of the micro fared rating
you’d be OK. Don’t know if it’s true or not but it hasn’t caused any problems for me
as of yet.

View wunderaa's profile

wunderaa

182 posts in 801 days


#3 posted 483 days ago

Swap the other one and you’ll be just fine. These starting caps are readily available if you look around.

Starting cap

Good luck!

View tenontim's profile

tenontim

2131 posts in 2343 days


#4 posted 483 days ago

If you have a local air conditioning service company in the area, they would most likely have one.

View 404 - Not Found's profile

404 - Not Found

2544 posts in 1568 days


#5 posted 483 days ago

BACK UP AND RUNNING!

Thanks guys, swapped out the one from the BS, just wanted to check before snipping any wires.

Thanks again

View crank49's profile

crank49

3337 posts in 1569 days


#6 posted 483 days ago

I’m a little late to the party, as usual, but glad you got it back running.

The main thing you have to be careful with capacitors is the voltage rating.
It’s nice to match the uf rating within plus/minus 20%, but the voltage needs to be at least as high or greater.

A mis-matched uf rating might not work as well but it won’t fry.
Too low on the voltage and it might not pass the smoke test.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View 404 - Not Found's profile

404 - Not Found

2544 posts in 1568 days


#7 posted 483 days ago

Thanks Michael, that’s good to know if another one burns out.

View Grandpa's profile

Grandpa

3047 posts in 1274 days


#8 posted 482 days ago

I had the same thought as tenontim. go to an A/C shop. They have most of them.
oops!! I just looked and you might be in an area where they don’t use A/C…....hhhhmmmm

View woodbutcherbynight's profile

woodbutcherbynight

1236 posts in 1007 days


#9 posted 482 days ago

Regrettably having a spare on hand will make you mad as they have a odd tendency to be “dead” after years of storage. They cannot explain it, will refute it, but they know it is true in the end. My Grandfather had a box of them in his shop when he died, all about 10 years old. We chekced them all and only one of 34 actually checked good with a uF meter. Go figure..

-- Live to tell the stories, they sound better that way.

View kizerpea's profile

kizerpea

746 posts in 966 days


#10 posted 482 days ago

any HVAC supply house should have them..

-- IF YOUR NOT MAKING DUST...YOU ARE COLLECTING IT! SOUTH CAROLINA.

View HorizontalMike's profile

HorizontalMike

6915 posts in 1512 days


#11 posted 482 days ago

woodbutcherbynight,
The electrolyte dries up and the capacitors fail, over time. That is likely why all those ‘spares’ were bad.
http://en.wikipedia.org/wiki/Electrolytic_capacitor

-- HorizontalMike -- "Woodpeckers understand..."

View nwbusa's profile

nwbusa

1016 posts in 885 days


#12 posted 482 days ago

Leaky caps. Been there, done that.

-- John, BC, Canada

View MrRon's profile

MrRon

2716 posts in 1842 days


#13 posted 482 days ago

Renners, Are you posting from Britain, or are you English?

View redryder's profile

redryder

2102 posts in 1700 days


#14 posted 482 days ago

Sourced a replacement but it won’t ship for a fortnight

There’s an expression you don’t hear often. Nicely said…....................

-- mike...............

View woodbutcherbynight's profile

woodbutcherbynight

1236 posts in 1007 days


#15 posted 481 days ago

HorizontalMike, thanks for the reason I had wondered the why of it. My Father gave me a Jet 1014 mini lathe and after a few uses the capacitor gave out. He used it maybe 2 times in the last 7 years??

-- Live to tell the stories, they sound better that way.

showing 1 through 15 of 18 replies

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