Angle grinder - brush is sparking badly

AL_n · 2011-07-15T13:34:16+00:00

I purchased a 9" angle grinder (Wolf) on eBay. After using it for about 30 minutes, one of the brushes started sparking badly. I could hear the arcimh amd and see the flashes right through the yellow casing! I removed the inspection cover and ran the grinder, I could see bright blue sparking travelling right around the commutator ()if that's the segmented copper drum that the brushes rub against) and flying out from where the nearest brush contacts the commutator. Is this something I should worry about, or is it normal? Is there any maintenance operation I can do to cure it?Thank you.Al

Jul 15, 2011 23 Replies

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newshound 9 years ago

I remember them!

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newshound 9 years ago

And here is one

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Dave Plowman (News) 9 years ago

And the time taken to fit an accessory meant it was quicker to do it by hand. And, of course, the speeds were all wrong.

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tabbypurr 9 years ago

Long ago someone gave me a B&D circular saw attachment. I tried it, it was marginally quicker than sawing by hand. In fairness though I don't remember how sharp it was. Steel teeth of course.

It's also a question of what folk could afford. I remember balking at a ham mer drill at £80 in the 1980s.

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