Medium
30-60 minutes
This part is sourced from the original manufacturer for use with Makita hammer drill-drivers. The gear assembly contains the gears that help to drive the chuck. Unfortunately, over time parts may wear out or get damaged eventually requiring a replacement. Keep in mind this high-quality gear assembly is sold as an individual item. Refer to the owner's manual and the diagrams for your model to ensure the correct repair procedure.
Gear Assy Bhp452hw 125387-0
OEM part for: Makita
Part Number: 125387-0
$55.66
In Stock
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Compatibility
This part will fit the following 13 machines
Makita
BHP452 18V LXT Lithium-Ion Cordless 1/2" Hammer Drill-Driver View Diagrams & Manuals
BHP452H2 (Type 1) Drill View Diagrams & Manuals
BHP452H2 (Type 2) Drill View Diagrams & Manuals
BHP452H2 (Type 3) Drill View Diagrams & Manuals
BHP452H (Type 1) Drill View Diagrams & Manuals
BHP452H (Type 2) Drill View Diagrams & Manuals
BHP452H (Type 3) Drill View Diagrams & Manuals
BHP452HW (Type 1) Drill View Diagrams & Manuals
BHP452HW (Type 2) Drill View Diagrams & Manuals
BHP452HW (Type 3) Drill View Diagrams & Manuals
BHP452 (Type 2) Drill View Diagrams & Manuals
BHP452 (Type 3) Drill View Diagrams & Manuals
BHP452Z Drill View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Cordless Drill Parts
- Drill Parts
- Hammer Drill Parts
Customer Part Reviews ?
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easy repair
worked perfect
mervin -
November 28, 2022
Verified Purchase
Worked fine
Fit perfectly
Julian -
December 27, 2020
Verified Purchase
Makita drill “gear assembly”
Brand new part, well packaged.
Drill is working like new.
iGlobal -
July 3, 2019
Verified Purchase
t
t
t -
t days ago
Verified Purchase
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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.
Gear assembly needed to be replaced
Ron - March 1, 2022
Tool Type
Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver
Parts Used
Reinstall a little time consuming everything has to be just right
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Hammer drill clutch was slipping
Anthony - June 6, 2018
👍 0 of 1 people found this instruction helpful
Tool Type
Hammer Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Magnetic tray and clean cloth
Open drill chuck,
Remove reverse thread screw,
Unscrewed chuck off spindle
Removed case screws ( 9 ea. ) one screw is under motor end cover plate
Separate case halves
Remove old clutch and replace with new clutch
Replace motor brushes ( wasn't really needed, but as cheap as they are, I wanted to replace.
Reassemble unit.
REMEMBER: Drill chuck has a reverse thread screw in side. It is righty remove, lefty to tighten. It has thread lock on it. It will tough to start, but it will come loose. To remove chuck, open chuck , insert an Allen wrench in chuck and tighten jaws. Give the Allen wrench a good smack with hammer to loosen chuck off of drill. These threads are normal right hand threads. My hammer drill works like new.
Remove reverse thread screw,
Unscrewed chuck off spindle
Removed case screws ( 9 ea. ) one screw is under motor end cover plate
Separate case halves
Remove old clutch and replace with new clutch
Replace motor brushes ( wasn't really needed, but as cheap as they are, I wanted to replace.
Reassemble unit.
REMEMBER: Drill chuck has a reverse thread screw in side. It is righty remove, lefty to tighten. It has thread lock on it. It will tough to start, but it will come loose. To remove chuck, open chuck , insert an Allen wrench in chuck and tighten jaws. Give the Allen wrench a good smack with hammer to loosen chuck off of drill. These threads are normal right hand threads. My hammer drill works like new.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
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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.
