Milwaukee Tool 48-89-4640 Reduced Shank Drill Bit 3/4 in

Product Description

The MILWAUKEE TOOL 48-89-4640 is a reduced shank twist drill bit engineered for demanding jobsite drilling applications. It features a 3/4-inch cutting diameter paired with a 1/2-inch Weldon shank, allowing it to run in standard 1/2-inch chucks without requiring a full-size chuck upgrade. The 135-degree split point provides fast, self-centering penetration with reduced walking on entry. Constructed from high speed steel with a coated finish, this bit handles the friction and heat generated during extended drilling cycles in metal, wood, and composite materials.

This bit is sized for applications where a full 3/4-inch shank would be impractical — particularly when using 1/2-inch drill motors or magnetic drill press chucks common on commercial and industrial jobsites. The 3-flat Weldon shank design prevents bit slippage in the chuck under high-torque conditions. With a 3-inch flute length and 6-inch overall length, it provides adequate reach for typical through-hole and blind-hole work in structural components, framing hardware, and mechanical systems. Licensed electricians, plumbers, HVAC mechanics, and general contractors are the primary installers of this tool.

Key Features

• 3/4-inch cutting diameter on a 1/2-inch reduced Weldon shank — runs in standard 1/2-inch chucks
• 135-degree split point for self-centering entry and reduced thrust force
• 3-flat Weldon shank prevents rotation and slippage under high torque
• High speed steel construction with coated finish for heat and wear resistance
• 3-inch flute length supports up to 3 inches of drilling depth
• 6-inch overall length for reach in confined or layered material applications

Compatibility

Designed for use in 1/2-inch keyed or keyless drill chucks and compatible magnetic drill press arbors that accept Weldon-shank bits. Suited for jobsite drilling in metal, wood, and composite materials.

Installation Notes

Install and remove this bit only with the drill motor fully powered down and the chuck unlocked. Secure the Weldon shank firmly in the chuck, ensuring at least one flat engages the chuck set screw when used in a magnetic drill press. Wear appropriate eye protection during drilling operations. Inspect the cutting edges before each use and replace if chipping or significant wear is observed.