Easy
15-30 minutes
This replacement brush holder is a high quality item specially designed for Makita drill drivers. It is an authentic item that is sourced directly from original equipment manufacturer. It is used to secure carbon brushes that conduct electric current. Please note, this item includes a plastic ring, two metal brush holders with lead wires attached. Keep in mind, carbon brushes are not included, they are sold separately. You will need a screwdriver to complete this repair.
Brush Holder 638431-9
OEM part for: Makita
Part Number: 638431-9
$7.70
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 13 machines
Makita
BHP451 Drill / Driver View Diagrams & Manuals
BDF451 Drill / Driver View Diagrams & Manuals
BDF451Z Cordless 1/2" Driver-Drill View Diagrams & Manuals
BDF451 (Type 1) Drill View Diagrams & Manuals
BDF451 (Type 2) Drill View Diagrams & Manuals
BDF451 (Type 3) Drill View Diagrams & Manuals
BDF451 (Type 4) Drill View Diagrams & Manuals
BDF451Z (Type 1) Drill View Diagrams & Manuals
BDF451Z (Type 2) Drill View Diagrams & Manuals
BDF451Z (Type 3) Drill View Diagrams & Manuals
BDF451Z (Type 4) Drill View Diagrams & Manuals
BHP451 (Type 2) Drill View Diagrams & Manuals
BHP451 (Type 3) Drill View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Drill Parts
- Cordless Drill Parts
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Works as advertised
This is a great replacement part for my Makita drill. The drill had been intermittently working and the brush area had been getting warm when it did work. I order this part and new brushes, and everything fit perfect. The only thing I should have noted when taking it apart is that the motor fits in with the notch down. Once I figured the clocking out it went back together nicely.
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January 10, 2022
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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.
Brushes were worn out, heat build up, brush holder partially melted, drill stopped running.
warren - February 24, 2016
👍 3 of 3 people found this instruction helpful
Tool Type
Hammer Drill
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver
Parts Used
Ordered new brushes and brush holder. Disassembled drill, removed old brush holder and brushes,cleaned commutator, installed new brush holder and new brushes. Reassembled drill. Drill runs like new. Great website, easy to find parts and view, reasonable prices. A rare, but great experience.
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Drill quit working.
Aristotle - August 17, 2017
Tool Type
Cordless Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Power Drill
Parts Used
1. Took apart.
2. Removed the worn parts.
3. Replaced with the new ones.
4. Reassembled and tested.
2. Removed the worn parts.
3. Replaced with the new ones.
4. Reassembled and tested.
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The brush frozen in the brush holder.
David - August 2, 2017
Tool Type
Cordless Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
, #2 Phillips, needle nose pliers
Parts Used
Removed and replaced.
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Intermittent Function. Shaking would sometime cause it to start.
Jonathan - June 4, 2017
Tool Type
Cordless Drill
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Small screwdriver to hold the brush spring back.
Parts Used
Both halves of the rear cover needed to be removed from the motor assembly in order to replace the brush holder, that was the only complication. A lot of things (trigger, speed selector) must come out of their nested position and need to be put back into place carefully.
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Cordless Drill was not rotating.
Christopher - January 27, 2017
Tool Type
Cordless Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Open the back cover of the drill with a screwdriver.
Replaced a damaged Carbon Brush set.
Replaced a damaged Carbon Brush set.
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Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
