Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee 7/16 in. Hex Chuck Assembly
Model Number: 42-66-0050
The Milwaukee 42-66-0050 is a genuine OEM 7/16 in. Hex Chuck Assembly for the 2808-20 and 2708-20 M18 FUEL 7/16 in. Hex Hole-Hawg drills. These Hole-Hawg drills are right-angle drilling tools built for boring large-diameter holes through studs, joists, and plates, and the 7/16 in. hex chuck is the quick-change accessory holder at the drill's output. The 7/16 in. designation describes the hex drive the chuck accepts: it is sized to receive 7/16 in. hex-shank drilling accessories, such as self-feed bits, auger bits and auger bit adapters, selfeed bits, and 7/16 in. quick-change arbors for hole saws, locking them into the chuck for high-torque drilling. The chuck grips the hex shank and transmits the drill's full torque to the bit while allowing fast, tool-free bit changes. Because the chuck takes the full drilling torque and sees repeated bit changes, it is a wear item: a worn, cracked, or failed chuck that no longer retains bits securely, or whose retention mechanism slips, requires replacement to restore reliable, high-torque drilling. Replacing it with the correct genuine Milwaukee OEM chuck assembly restores secure bit retention and full drive.
Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee service parts diagram before placing your order, since running production changes can alter part compatibility within the same catalog number. This 7/16 in. hex chuck assembly is specified for the 2808-20 and 2708-20 7/16 in. Hex Hole-Hawg drills, so confirm your tool's catalog and serial number against the parts diagram before ordering. Note that this chuck accepts 7/16 in. hex-shank drilling accessories; it is not a 1/4 in. hex bit holder for screwdriving, and it is specific to the 7/16 in. Hole-Hawg. When installing the chuck, it is torqued onto the output shaft and secured with the chuck screw to the Milwaukee-specified torque, so follow the correct service procedure. The output shaft, gearcase, and the chuck screw that work with the chuck are separate parts, so refer to your tool's parts diagram for the correct companion part numbers.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- 7/16 in. Hex Chuck Assembly for the 2808-20 and 2708-20 Hole-Hawg drills
- The quick-change accessory holder at the output of the Hole-Hawg
- Accepts 7/16 in. hex-shank drilling accessories
- For self-feed bits, auger bits, and 7/16 in. quick-change arbors
- Grips the hex shank and transmits full drilling torque to the bit
- Allows fast, tool-free bit changes
- Restores secure bit retention and full drive when worn or failed
- For the M18 FUEL 7/16 in. Hex Hole-Hawg right-angle drills
- Not a 1/4 in. hex bit holder for screwdriving, specific to the Hole-Hawg
- Output shaft, gearcase, and chuck screw are separate parts, sold separately
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 42-66-0050
- Official Description: 7/16 in. Hex Chuck Assembly
- Component Type: Hole-Hawg output chuck
- Drive Size: 7/16 in. hex
- Accepts: 7/16 in. hex-shank drilling accessories (self-feed bits, auger bits, quick-change arbors)
- Primary Fitment: 2808-20 and 2708-20 M18 FUEL 7/16 in. Hex Hole-Hawg drills
- Parts Diagram Position: Figure 67 (2808-20) / Figure 68 (2708-20) on the Hole-Hawg service parts lists
- Also Referenced On: Verify additional applications using Milwaukee's online parts lookup
- Quantity: Sold as an assembly, (1) required per tool
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Milwaukee 42-66-0050 7/16 in. Hex Chuck Assembly
The output shaft, gearcase, chuck screw, and other components that work with the chuck are NOT included, vary by tool, and are sold separately - refer to your tool's parts diagram for the correct part numbers and quantities. Always verify by serial number using Milwaukee's online parts lookup before ordering.
- Type: Hex Chuck Assembly
- Chuck Size: 7/16 in.
- Application: 1/4 in. Hex Shank Bit Retention on Compatible Milwaukee Screwguns
- Compatibility: Always verify part compatibility using your tool's model and serial number before ordering
Includes
- (1) Milwaukee 42-66-0050 7/16 in. Hex Chuck Assembly
