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Product Description
?This #191938-1 (CB-408) Makita carbon brush set contains two individual 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 Together
?Troubleshooting
- Makita
- Angle Grinder
- Grinder
- Screwdriver
- Electric Drill
- Planer Jointer
- Router
- Impact Driver
Videos For installing this part.
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Customer Repair Instructions
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
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Grinder was free. Just needed these parts
glenn from san diego, California
to much play in bearing and noise from being loose
frank from SANTEE, California
- Difficulty Level:
- Easy
- Total Repair Time:
- 30 - 60 mins
- Tools:
- Screw drivers
dismantle clips and use socket to pop out first bearing
use vise with 2 screw drivers holding underneath the bearings and with soft blow hammer
then re-assemble all
Needed new brushes
Bonnie from Silsbee, Texas
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
- Parts Used:
- CB408
Then removed the worn brushes from the brush holders
Installed the new brushes in the brush holders
Screwed on the brush caps
Maintence
Bruce from Somers, New York
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
- Parts Used:
- CB408
Tool got flooded
Robert from Leominster, Massachusetts
brushes worn
Billy from MARBLE FALLS, Texas
- Difficulty Level:
- Easy
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Pliers, Screw drivers
Overheated drive motor
Richard from Miami, Florida
- Difficulty Level:
- A Bit Difficult
- Total Repair Time:
- 30 - 60 mins
- Tools:
- Pliers, Screw drivers, Wrench set
Remove outer case
Remove belt transmission with drum and armature
Unhook field and brushes connections
Pry field (melted into case)out of case
Prepare case where melted
Extract inner armature bearing
Install and connect field and brush terminals (spiral springs)
Remove drive b ... Read more elt, remove drive pulley (LH threads)
Install drive pulley on new armature
Press into case
Install brushes
Install case
Bad bearings, bad brushes, missing handle.
Okey from Casey, Illinois
- Difficulty Level:
- A Bit Difficult
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Screw drivers
2. Removed the motor armature.
3. Removed the bearings from the armature.
4.Replaced the bearings on the armature.
5. Cleaned the brush housing by removing the brushes and using compressed air cleaned the brush housing and replaced the brushes.
6. Cleaned the inside of the housin ... Read more gs and reassembled them.
7. Installed the missing grip.
8 Installed a new grind disk and tested.
9. Worked like a new one and the brushes did not spark a lot nor did the bearings vibrate and squeal.
Remove brush access caps
Albert from Dedham, Maine
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
- Parts Used:
- CB408
Was replacing the broken switch and thought to also replace the brushes as it is several years old
James from Reidsville, North Carolina
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
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Model Cross Reference
Manufacturer Part Number: CB408
| Brand | Model Number | Description |
|---|---|---|
| Makita | 3703 | Laminate Trimmer - 1/4" Laminate Trimmer |
| Makita | 3707F | Trimmer - Grass Trimmer |
| Makita | 3707FC | Laminate Trimmer - Fixed Base Laminate Trimmer |
| Makita | 3708F | Trimmer - Grass Trimmer |
| Makita | 3708FC | Laminate Trimmer - Tilt Base Laminate Trimmer |
| Makita | 3709 | Laminate Trimmer - Tilt Base 1/4" Laminate Trimmer with L.E.D. Light |
| Makita | 3710 | Trimmer - Grass Trimmer |
| Makita | 3901 | Biscuit Joiner - Plate Joiner |
| Makita | 6812 | Electric Drill - Drywall Screwdriver |
| Makita | 6830 | Electric Drill - Screwdriver |
| Makita | 6832 | Electric Drill - Screwdriver |
| Makita | 6834 | Electric Drill - Screwdriver |
| Makita | 6842 | Screwdriver - Screwdriver |
| Makita | 6844 | Electric Drill - Autofeed Screwdriver |
| Makita | 6845 | Screwdriver - Screwdriver |
| Makita | 6845L | Screwdriver - Screwdriver |
| Makita | 6922NB | Nibbler & Shears - Shear Wrench |
| Makita | 6950 | Impact Driver - Impact Driver |
| Makita | 6951 | Impact Driver - Impact Driver |
| Makita | 6953 | Impact Driver - Impact Wrench |
| Makita | 9031 | Sander Polisher - Belt Sander |
| Makita | 9032 | Sander Polisher - Belt Sander |
| Makita | 9501B | Angle Grinder - Grinder |
| Makita | 9503BH | Angle Grinder - Grinder |
| Makita | 9523NB | Angle Grinder - Grinder |
| Makita | 9523NBH | Angle Grinder - Angle Grinder |
| Makita | 9524NB | Angle Grinder - Grinder |
| Makita | 9525NBX | Grinder - Grinder |
| Makita | 9526PB | Angle Grinder - Grinder |
| Makita | 9526PBH | Angle Grinder - Angle Grinder |
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.