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Repair Parts Home  Power Tool Parts  Makita Parts  CB303 Carbon Brush Set

Carbon Brush Set

Part Number: CB303
Makita
Availability: 25+ in stock
Price: $9.46
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*This part replaces obsolete part #: 194996-6 and 191963-2.

Product Information
Manufacturer: Makita
Product Number: CB303
Classification: Part
Weight: 0.01 lbs.
Also Known As: Motor Brush Set
Shipping: Ships Worldwide
Description:
Set of 2 Carbon Brushes with wire leads and brush springs attached. The set contains genuine Makita replacement parts, and comes packaged in a Makita retail box.

This brush set will fit the Makita tools listed at the bottom of the page.

• Worn brushes are often the cause of a poorly running motor
• Replacing brushes can fix an intermittent motor
• New brushes can restore a motor’s electric braking


Carbon motor brushes are one of the most commonly replaced power tool components.
Because carbon brushes are wear items, meaning that through friction and use they will gradually wear away, they will eventually require replacement.
Worn brushes are common causes of intermittent motor function, reduced electric braking, and reduced motor power.
A worn out brush will often be worn down near the wire lead and may be cracked, pitted, or burned.
When replacing carbon brushes, be sure to also inspect your armature for burns, cracks, or other damage which indicates a larger motor problem.

Frequently Purchased With
Compatibility

This part is compatible with the following machines:

Makita
Expand the 87 compatible machines
Products Compatibility

This item works with the following types of products:

  • • Band Saw
  • • Blower
  • • Circular Saw
  • • Drill
  • • Grinder
  • • Miter Saw
  • • Pole Saw
  • • Polisher
  • • Reciprocating Saw
  • • Router
  • • Sander
  • • Saw
Expand List
Questions & Answers

What is the thickness & width & length of this 303 carbon brush?
Gary asked on 2022-02-07
Hello Gary, Thank you for the question. The CB303 Carbon Brush set is 19mm Length x 11mm Width x 5mm Thickness. If you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you!
Repair Instructions: Submitted by Customers Like You
5 of 5 people found this instruction helpful
Tool Type:
Polisher
Parts Used:
Carbon Brush Set - CB303
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, None
Bad brushes
Took off covers of brush pocket l/r removed old and installed new and fired right up
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5 of 5 people found this instruction helpful
Tool Type:
Polisher
Parts Used:
Ball Bearing - 211106-1
Ball Bearing - 211031-6
Carbon Brush Set - CB303
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Power Drill, Nutdriver
Bearings worn on 2 polishers-Makita plus brushes worn.
Remove both the head and open the handle, take brushes out then slide armature out and use a bearing puller to remove bearings and tap new ones on using a deep well socket the same size if the inner race of the bearing and a rubber mallet to drive on. Then put in new brushes and close the tool up..
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2 of 2 people found this instruction helpful
Tool Type:
Sander
Parts Used:
Carbon Brush Set - CB303
Belt - 225084-9
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Worn belt and brushes
Remove the belt cover and the old belt
Install the new belt on the pulleys
Remove the brush caps and the old brushes
Install the new brushes, then replace the brush caps
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1 of 1 people found this instruction helpful
Tool Type:
Router
Parts Used:
Carbon Brush Set - CB303
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Worn brushes
1. Remove the brush caps with a screwdriver.
2. Remove the brushes from the tool
3. Install the new brush in the tool
4. Replace the brush caps with the screwdriver
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Tool Type:
Circular Saw
Parts Used:
Carbon Brush Set - CB303
Switch SGES115C-3 - 651288-1
Terminal Block 1P - 654532-5
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver
Switch was not working brushes need replacement
Disassembled the saw and replaced the switch and brushes.
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Tool Type:
Circular Saw
Parts Used:
Carbon Brush Set - CB303
Switch SGES115C-4 - 651252-2
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, Pliers, Power Drill, Socket set, Wrench Set, Nutdriver, Adjustable Wrench, Many
Worn out switch and brushes for circular saw
Removed old switch and brushes and replaced with new.
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Tool Type:
Grinder
Parts Used:
Ball Bearing - 211031-6
Carbon Brush Set - CB303
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, small vise, spray cleaner and small piece of 600grit paper
rear commutator bearing wore out and brushes wore unevenly loosing power
1. Took apart black and decker 9 amp grinder.. took pics with phone for trigger button and hold down pin. Also taking notes of length screws and where.
2. Gently separated handle (2 pieces). Took more pics. Analysed damage. Removed brushes by removing black flat caps, lifted torsional spring and lifter them out. Also spray cleaned the insides and all vents wiping everything clean from grit and whatever that black stuff is..
3. Slid out motor, brake cleaned off dust and grim. 600 grit sand paper on brush area very lightly to clean. Removed old bearing with vise by gently twisting it off.
4. Added the rubber ribbed boot then bearing on motor assembly.
5. Slid motor assembly back in making sure bearing-boot assembly was completely inside its support.
6. Raised each torsional spring sliding the brush in with wire facing the slotted end to float freely. Then let the spring down on top of the brush.. then the black plastic protective cap on the brush assembly.
7. The trigger lever and locking button was tricky. The black push lock button goes in one of 2 ways. Most I would imagine would be similar such that placing it in the handle first, it should point strain up in alignment with trigger. The trigger fits in the one side with the black push button..which needs to be put in its place before securing it fully it on the motor assembly. Make sure the black plastic cap did not fall off in the process as it can (and dislodge preventing the 2 halves coming together tightly..do not force..it should slowly come together with gentle persuasion).
8. Making sure no wires where hanging loose and in their proper places and clearance slots.. move trigger switch into position into the handle half you have with the trigger.. Holding switch in place, check trigger operation for the on off clicking, then the black lock button that holds the trigger on-in..
9. Gently lower top half on..making sure the trigger pin pivot fits inside that half properly and with the switch still in its position. Also double checking no wires came loose and may be hanging outside the interior and may get caught up in the 2 halves coming together.
10. Screw back together and check trigger operation again. Pat yourself on your back..
11. Optional. Check grinder head pinion gear bearing.. Mine was good, I scrapped off the old grease and added high speed bearing gear grease to the pinion and crown gears in the head of the grinder..(4 screws from the top)..
12. Testing. It will take a few minutes for the brushes to set properly imo. Also, until the bearing grease in the head moves a bit, there will be a lot of drag. It goes away after a few seconds or so. fresh everthing. Grinder worked like brand new! Thanks eReplacementparts.com!!
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Tool Type:
Polisher
Parts Used:
Carbon Brush Set - CB303
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Motor was lagging and not steady
Unplugged polisher, removed brush holder screw caps. Removed old brushes and replaced with new ones. Reinstalled caps. Tested polisher , worked great back to like new.
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Tool Type:
Miter Saw
Parts Used:
Carbon Brush Set - CB303
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Carbon brushes were worn. Saw was 20 years old
1. Remove the 2 brushes with screwdriver
2 replace brushes
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Tool Type:
Sander
Parts Used:
Carbon Brush Set - CB303
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Worn down brushes
Removed old brushes and slid in the new. Simple.
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Reviews
4.6
Average Rating (out of 5):
7 Reviews
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  • Yes, Parts Please
    I can always count on them to have the parts that I need
    Lawrence - May 6, 2022 Verified Purchase
    worked as expected
    fast service
    Guest - August 10, 2020 Verified Purchase
    Fast shipping, great packaging
    Great pricing, right product, delivered faster than expected. Ordering is easy and shipping is faster than others I’ve used.
    Stephen - November 7, 2019 Verified Purchase
    Good value
    Fast delivery. Good value.
    Guest - October 4, 2019 Verified Purchase
    super easy
    Received our parts fast. Popped them in, and went to work. thanks
    Guest - June 15, 2019 Verified Purchase
    Umm.. That wrong part was sent by mistake? Not the Carbon Brush set. Another part. Not sure. Def wrong part, but mistake.
    The parts we received in good shape, but a bit slow. Maybe cause of the holidays. Also, I received one of the parts incorrectly. Could of been an honest mistake. Wrong numbers posted. The representative at eReplacementParts, was AWSOME!! super helpfull. Great Customer service. Thanks.
    Guest - January 29, 2020 Verified Purchase
    It does what it does.
    It's a carbon brush. One got old. I bought a new one. Inundating my email over and over for reviews and technical details is more annoying than helpful. There is nothing you can do to inflate the quality or relative importance of a motor brush. If you need one, you buy one. I like eReplacementparts well enough. Don't spoil it.
    Dave - November 9, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
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    Product Information
    Manufacturer: Makita
    Product Number: CB303
    Classification: Part
    Weight: 0.01 lbs.
    Also Known As: Motor Brush Set
    Shipping: Ships Worldwide
    Repair Guides
    Watch the Repair Video for Carbon Brush Set
    Articles:
    Step-by-step instructions for removing and installing the motor brushes on your Makita angle drill....
    February 27, 2018

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