Medium
30-60 minutes
This is a 1/2-inch OEM keyless chuck for hammer drills, allowing users to swiftly change drill bits and attachments without requiring a chuck key. Due to the mechanical stresses it undergoes, the jaws of the chuck can break or wear significantly, resulting in a loss of grip or excessive play. If you encounter difficulty tightening or loosening the chuck jaws on your drill or notice wobbling during operation, replacement is necessary. To replace this chuck assembly, you will need a screwdriver or drill to remove the initial left-handed screw on the inside. To completely remove the chuck, it is recommended that you secure the drill in a vise or use the drill itself, along with an Allen key, to detach the main chuck assembly from the drill. Once the old chuck is removed, you can effortlessly install the new chuck along with its securing screw. Please note that this chuck assembly is sold individually and does not include any additional securing hardware that may be required.
Keyless Chuck Assembly 42-66-1006
OEM part for: Milwaukee
Part Number: 42-66-1006
Order within the next 12 hours and your part ships today! 
Jump To:
Frequently Purchased Together ?
Compatibility
This part will fit the following 1 machine
Milwaukee
This item works with the following types of products:
- Drill Parts
- Hammer Drill Parts
This part replaces obsolete part #: 42-66-2707, 42-66-2706
Customer Part Reviews ?
- 1
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 Assembly
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.
Chuck teeth misaligned
Tool Type
Hammer Drill
Difficulty
Hard
Time
More than 2 hours
Tools Used
Screwdriver, Socket set, Wrench Set, Nutdriver, USE STAR HEX WRENCHES, wait for hefty co-worker to arrive.
Parts Used
Drill Chuck was rusted
Tool Type
Hammer Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Pliers, Torx bits
Parts Used
Keep that in mind when you're changing your chuck! All the new drill may have Torx head screws instead of phillips.
Chuck was rusty and losing grip frequently
Tool Type
Hammer Drill
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Torq and large Allen key hammer
Parts Used
Open chuck all the way.
I used the torq but I believe it was a t-35 and my 1/4 drive impact and took it out.
Then I used large Allen key, tightened it in the chuck, position it just right and smacked it with a hammer and broke it loose. Then came off w/ a problem.
Worn out Chuck,brushes and polling.
Tool Type
Hammer Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Wrench Set, Nutdriver
keyless chuck hard to open/close
Tool Type
Hammer Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers, t30 impact
2] put tool in vise, used large water pump pliers to unscrew chuck.
3] screwed new chuck on, installed new screw, done.
Drill chuck was failing to open and close as designed
Tool Type
Hammer Drill
Difficulty
Medium
Time
30-60 minutes
Tools Used
, Impact driver, Vise, Large hex wrench
Parts Used
2) Removed old chuck screw with impact driver LH threads
3) Tightened old chuck on short leg of large hex wrench, applied pressure in removal direction and assisted pressure with hammer strike
4) Once loose, removed old part..... installed new
One of the chuck jaws became out of alignment would not grip bits
Tool Type
Hammer Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, It took a torx bit to back the screw out...
Parts Used
Step 2...Removed chuck by inserting an allen wrench in chuck, tighten chuck onto allen wrench and then striking allen wrench with a hammer to break chuck loose. Then unscrewed chuck
Step 3...Screwed on new chuck
Step 4...Replaced center screw
Job complete
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.
