Question about Black & Decker 7750 4 1/2'' Small Angle Grinder

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Need new brushes - Black & Decker 7750 4 1/2'' Small Angle Grinder

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Match them up at ace hardware. Pull the screw out of the back by the cord. And slide that half down. Your brushes are exposed. Use the same spring that was in before and toss the new ones, unless they are close to the original. The ones that matched a recent 7750 (type 3) was #61702. Good luck.

Posted on Sep 27, 2015

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No power to bite


Needs new brushes. http://www.metabo.com/Spare-parts-lists-handheld.16913.0.html

When the brushes wear down they are held back by there power wires.There should be a set of small holes in the brush holders.Push new brushes to the bottom and put a wire through the small holes to hold brushes in place during reassembly.Pull out the wires and the new brushes will seat. Brushes don't cost all that much.

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1 Answer

The brush on my vacuum isn't turning and it is brand new. What do I need to do?


Firs thing you need to do is check to see if the belt that drives the brush is properly connected to both the brush and the motor drive. Also, even though you say it is brand new, did something get caught in the brush and cause it to jamb? You may want to remove the brush and clean it of all debris and reassemble with a new(?) drive belt.
If you find this advice helpful, I would appreciate your feedback in the thumbs up response. If you need additional help, feel free to contact me.
Paul

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I need new brushes for Powermate Air Compressor motor. Where can I purchase them or do I need to have a Technician install? Model #CL0551109 Thank You J.L. Brooks


Brushes are not listed as a replacement part for your compressor. Not to worry because universal brushes are available at tool repair shops, hardware stores and ebay. Measure your brush and order same size or slightly larger and sand to fit. Dont worry too much about the length of brush as they can be shorter than factory and still work fine (just longer than worn brushes). Some motors have a spring pushing brush onto armature and others utilize the spring attached to brush to make contact. You can cut off wire from back of brush if needed, however if your motor needs brushes with spring attached, find close match and solder your old contact and spring to new brush. Also check for other problems because brushes should last the life of motor on your unit. Good luck

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1 Answer

Sourcing motor brushes for E675 jazzy motor?


Hi Lane. What happened to your old brushes?
Be carefull fitting different brushes to your machine. If you do, make sure that the brushes you use are also for a 24 volt DC motor. Different voltage motors have different types of material used for the brushes, they can damsge your commutator if you use the wrong ones.
If you find some that are slightly to big, it is Ok to carefully file them down to size.
Contact a local service agent, they often have used brushes that still have a bit of life in them.
I often use brushes from one brand in other brands of machine, and have used brushes as well, but we are probably too far away in New Zealand.
Good luck. Neil.

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1 Answer

I need new brushes for my Pro-Tech miter saw


Take out the old brushes, take them to the hardware store, they have a box full of different size brushes, one will fit your saw.

Mar 12, 2010 | Saws

1 Answer

Need to replace motor brushes on Kenmore canister vacuum 116.25914503 - Getting lots of arcing at brush ends. Need tear-down steps to get at the brushes.


If you can see the arcing you are likely in the motor housing. The brushes are specific to the motor depending on RPM. Most brushes and motors in Sears units are supplied by AMTEK Lamb. The color on the plastic housing and stamped model # on motor will help identify the correct carbon brush, however new brushes will NOT always solve your problem if the motor is arcing.
If the armature is worn like an apple core or if the lines between segments on the copper commutator are gaping and not parallel you will need a new or rebuilt motor.
If brushes are properly removed there is a tiny flag terminal which will slide out of most brush housings where the wire meets the brush itself. New brushes are best installed after dressing the armature surface with a fine carbarundum seating stone or very fine wet dry sandpaper and then the motor is run in at half speed at reduced voltage.
|There is usually a hold down clamp over each brush to seat it and a lock tab underneath to align the new brush.

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you might need a new agitator (brush). if you caught something on it like : shoe laces, socks or anything that stops the brush. you should see on the brush were the v-belt goes burn marks or even gashes. this is a indication that you need a new brush.

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2 Answers

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Make sure the vacuum is on the carpet setting..the brush won't turn on the hard floor setting..

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2 Answers

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The front brush motor will not engage until the power is turned on and the handle is in the down position. In the upright position the brush motor wont engage. Typical faults will be the belt is broken and needs replacing or the fornt brush motor needs replacing.

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