Milwaukee 48-89-2512 Cobalt Jobber Drill Bit 135 Split Point

Product Description

The MILWAUKEE 48-89-2512 is a cobalt jobber-length twist drill bit engineered for hard metal drilling applications. It features a variable helix design with an aggressive 35-degree angle that transitions to 15 degrees, promoting rapid chip evacuation and limiting heat buildup during extended use. The 135-degree split point tip delivers a self-centering start and eliminates walking on hard surfaces. A chip breaker geometry further reduces heat. This bit is sold individually and is suited for use in standard drill chucks by electricians, pipefitters, ironworkers, and metal fabricators working with hard or abrasive materials.

This bit is intended for hard metal applications including stainless steel, high-strength alloys, and other tough materials that cause premature wear in standard high-speed steel or black oxide bits. The variable helix design makes it effective across a wide range of twist drilling tasks. The secure-grip shank geometry helps prevent slipping inside the chuck during high-torque operations, making it a practical choice for production drilling or field repair work where bit retention and hole accuracy matter.

Key Features

• Variable helix design transitions from 35 degrees to 15 degrees for rapid chip removal and reduced heat buildup
• 135-degree split point tip provides a self-centering start and prevents walking
• Chip breaker geometry decreases heat accumulation during continuous drilling
• Secure-grip shank reduces slippage in chuck during high-torque use
• Cobalt construction delivers extended service life in hard metal compared to black oxide bits
• Metric sizing; sold as individual unit

Compatibility

Designed as a jobber-length twist drill bit compatible with standard keyed and keyless drill chucks accepting round-shank bits. Suitable for use in corded or cordless drills and drill presses across a wide range of twist drilling applications.

Installation Notes

Installation is performed by electricians, pipefitters, ironworkers, or qualified tradespeople using a compatible drill or drill press. Secure the bit fully in the chuck before operation and verify chuck tightness to prevent slippage. When drilling hard metals, use appropriate cutting fluid or lubricant to extend bit life and manage heat. Wear appropriate PPE including eye protection when operating drill bits in metal.

Technical Specifications

• Length: 5.7 inches
• Width: 1.9 inches
• Height: 0.25 inches
• Weight: 0.03 pounds
• Helix Angle: Variable 35 degrees to 15 degrees
• Point Angle: 135 degrees split point
• Unit of Measure: Each
• UPC: 045242519422

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2512