Product Description
Milwaukee Chuck Key for 3/8 in. and 1/2 in. Chucks with 1/4 in. Pilot
Model Number: 48-66-3280
The Milwaukee 48-66-3280 is a Chuck Key for Milwaukee 3/8 in. and 1/2 in. keyed drill chucks with a 1/4 in. pilot — a dual-capacity replacement tightening key that fits both Milwaukee 3/8 in. and 1/2 in. keyed chucks that use the 1/4 in. pilot hole specification, providing a single key for both drill chuck sizes. The 1/4 in. pilot pin engages the corresponding hole in the chuck body to positively locate the key and maintain full bevel gear engagement with the chuck's rack teeth throughout the tightening stroke — preventing the key from cocking under torque that would cause gear slip before full clamping force is reached. The dual 3/8 in. and 1/2 in. bevel gear specification means this key works with both chuck sizes, reducing the separate chuck keys needed when a shop or crew works with both 3/8 in. and 1/2 in. keyed chuck drills.
Milwaukee builds the chuck key from quality steel for the repeated tightening cycles of professional daily use. The T-handle provides the grip and mechanical advantage for applying the clamping force needed for secure bit retention across both chuck capacities. Always remove the chuck key completely before starting the drill — operating a drill with the chuck key inserted is a serious safety hazard that can cause severe injury from the key being ejected at speed when the drill starts. Verify compatibility with your specific Milwaukee keyed chuck models before ordering to confirm the 1/4 in. pilot specification matches your chucks.
Features
- Fits both 3/8 in. and 1/2 in. keyed chucks — one key for two chuck sizes
- 1/4 in. pilot for positive engagement and reliable full-torque tightening
- Reduces key inventory when working with both chuck sizes regularly
- Quality steel construction for durability through professional use cycles
- Always remove from chuck before starting drill — serious safety hazard if left inserted
Specifications
- Compatible Chuck Sizes: 3/8 in. and 1/2 in. (with 1/4 in. pilot hole)
- Pilot: 1/4 in.
- Type: Dual-Capacity Chuck Key with Pilot Pin
Includes
- (1) Milwaukee 48-66-3280 Chuck Key for 3/8 in. and 1/2 in. Chucks
