Product Description
Milwaukee Chuck Key for 3/8 in. Chucks with 1/4 in. Pilot
Model Number: 48-66-3350
The Milwaukee 48-66-3350 is a Chuck Key for Milwaukee 3/8 in. keyed drill chucks with a 1/4 in. pilot — a replacement tightening key for Milwaukee corded drills and drill presses equipped with a keyed 3/8 in. chuck that requires the chuck key for bit installation and removal. The 1/4 in. pilot pin at the key's bevel gear tip engages the corresponding pilot hole in the chuck body to locate the key and keep the bevel gear in full contact with the chuck's rack teeth during tightening and loosening — the pilot prevents the key from cocking sideways under the torque of tightening that would cause the bevel gear to jump teeth or strip the engagement before full clamping force is achieved. This pilot-style chuck key provides more positive engagement and more reliable tightening feel than non-pilot keys on the same chuck specification.
The 3/8 in. bevel gear specification matches the rack gear geometry of Milwaukee 3/8 in. keyed chucks — using a chuck key with incorrectly sized bevel gear teeth strips the chuck's rack holes and damages the key's gear teeth, producing unreliable chuck tightening and requiring both chuck and key replacement. Milwaukee builds the chuck key from quality steel for the repeated tightening cycles of professional daily use, with the T-handle providing the grip and mechanical advantage for applying the clamping force needed for secure bit retention in drilling applications. Always remove the chuck key from the chuck before starting the drill — operating a drill with the chuck key inserted is a serious safety hazard.
See Milwaukee's complete chuck key lineup for all available chuck key specifications and for replacement chucks for Milwaukee corded drills and drill presses.
Features
- 1/4 in. pilot pin for positive chuck engagement and reliable full-torque tightening
- 3/8 in. bevel gear matched to Milwaukee 3/8 in. keyed chuck rack geometry
- Pilot prevents key from cocking during tightening for consistent clamping force
- Quality steel construction for durability through professional use cycles
- Always remove from chuck before starting drill — serious safety hazard if left inserted
Specifications
- Chuck Capacity: 3/8 in.
- Pilot: 1/4 in.
- Type: Chuck Key with Pilot Pin
- Compatible Tools: Milwaukee Drills with Keyed 3/8 in. Chuck (1/4 in. pilot)
Includes
- (1) Milwaukee 48-66-3350 Chuck Key for 3/8 in. Chucks with 1/4 in. Pilot
