Easy
Less than 15 minutes
This is a genuine Milwaukee part, it is sold individually. The chuck is located on the to of the drill where you can add drill bits. The models listed below will show the compatible hammer drills. If your drill's bit retention is suffering, the rotation feels stiff, or the chuck has seized up entirely, a new chuck should fix the problem.
Installation is easy with these following steps. You will need to thread the chuck assembly onto the spindle then secure the chuck assembly as tightly as possible (by hand). Then open the chuck to accept the retaining screw and install the retaining screw. Secure the screw with a Phillips screwdriver. The screw is reverse threaded requiring counter clockwise rotation to secure.
Keyless Chuck (1/2-inch) 42-66-0200
OEM part for: Milwaukee
Part Number: 42-66-0200
$39.13
In Stock
Ships within 1 business day 
Jump To:
Product Description ?
- 1/2"
- Classification: Part
- Weight: 0.60 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 8 machines
Milwaukee
2603-20 (D55A) M18 Brushless Compact 1/2" Driver-Drill View Diagrams & Manuals
2403-20 M12 Brushless 1/2" 13mm Driver-Drill View Diagrams & Manuals
2403-22 M12 Brushless 1/2" 13mm Driver-Drill View Diagrams & Manuals
240420 M12 Brushless 1/2" 13mm Driver-Drill View Diagrams & Manuals
2404-22 M12 Brushless 1/2" 13mm Driver-Drill View Diagrams & Manuals
2404-20 M12 Brushless 1/2" 13Mm Hammer Drill View Diagrams & Manuals
2603-22 M18 Fuel Compact 1/2" Driver Drill View Diagrams & Manuals
2603-22CT M18 Fuel Compact 1/2" Driver Drill View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Drill Parts
- Hammer Drill Parts
Customer Part Reviews ?
Average Rating (out of 5):
Click to filter by ratings:
5 stars
3
4 stars
1
3 stars
0
2 stars
0
1 stars
0
< PREV
- 1
I Am very satisfied
My drill is working like new, the part fit perfectly and I received it promptly.
Al -
July 19, 2021
Verified Purchase
Item worked perfectly
Item worked perfect received in good condition fit well and received in good time
Guest -
December 21, 2020
Verified Purchase
Replacement drill chuck
A little trouble removing but new one fit fine and works fine
Guest -
June 13, 2019
Verified Purchase
Great parts and availability but super slow delivery!
The parts are of good quality, just don’t be in a hurry to receive them.
Guest -
7 days ago
Verified Purchase
t
t
t -
t days ago
Verified Purchase
eReplacementParts Team
t
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Keyless Chuck (1/2-inch)
No questions have been asked yet
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.
Defective chuck
Enrique - November 14, 2015
👍 6 of 7 people found this instruction helpful
Tool Type
Cordless Drill
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Hammer
Open the chuck all the way. Remove the chuck screw in the bottom of the chuck, it is a left hand thread. Use the largest allen wrench that will fit into the chuck. Then tighten the chuck on the short end of the allen wrench. Put the drill in the low speed setting and on the drill mode. Lay the drill on a flat surface, and strike the long end of the allen wrench with a hammer. It may take a few times but the chuck will start to thread off of the spindle. Replace with the new chuck and chuck screw.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Chuck jaw fell out
Howard - April 18, 2018
👍 4 of 4 people found this instruction helpful
Tool Type
Hammer Drill
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Removed faulty hammer drill chuck, ordered replacement chuck & installed it
Watched helpful YOUTUBE video
Watched helpful YOUTUBE video
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Chuck wouldn't tighten on drill bits
Christopher - October 24, 2021
Tool Type
Cordless Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Removed old chuck installed new chuck
Did you find this story helpful?
Thanks for voting and helping fellow customers!
keyless chuck was broken
James - May 5, 2019
Tool Type
Cordless Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, impact gun and bolt
Parts Used
I removed the screw from inside of the chuck, used an impact gun and a bolt to turn against the drills left-handed threads to loosen the broken chuck. I screwed in the new chuck, tightened and reinstalled screw. Exactly the same part.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Drill chuck broke
KENNETH - June 9, 2018
Tool Type
Cordless Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Wrench Set
Parts Used
I went to youtube and watched your video on the replacement steps. That made the whole job easy. https://www.youtube.com/watch?v=usC8unA5RiA
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Chuck wore out. Wouldn’t hold bit any longer
J&j - September 8, 2021
👍 0 of 1 people found this instruction helpful
Tool Type
Hammer Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Removed old one and replaced it with new one.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
The chuck would not tighten.
JEFF - June 26, 2017
👍 0 of 1 people found this instruction helpful
Tool Type
Cordless Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Hex driver.
Parts Used
Used a hex driver to remove the chuck. The screw is reverse threaded so turn to the right to loosen and to the left to tighten.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
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.
