Milwaukee 48-89-2504 Cobalt Red Helix Jobber Drill Bit

Product Description

The MILWAUKEE 48-89-2504 is a cobalt jobber-length drill bit engineered for cutting hard metals in demanding trade and industrial applications. The bit features a variable helix geometry with an aggressive 35-degree helix angle that transitions to 15 degrees, promoting rapid chip evacuation and reducing heat buildup at the cutting edge. A 135-degree split point tip provides a self-starting cut that eliminates walking on contact. Licensed tradespeople and machinists working with stainless steel, cast iron, and hardened alloys will find this bit suited to high-cycle production and maintenance drilling tasks. The bit measures 2.2 inches in length and is sized to metric specification.

This drill bit is designed for jobber-length twist drilling in hard metal applications including stainless steel, high-carbon steel, cast iron, and similar ferrous alloys. It is appropriate for use in both hand-held drills and drill press setups in residential, commercial, and light industrial environments. The metric sizing makes it suitable for technicians and tradespeople working to metric fastener and hole specifications. The cobalt steel construction and chip-breaker geometry give it extended service life compared to standard black oxide bits in abrasive or high-temperature cutting conditions.

Key Features

• Variable helix design: 35-degree angle transitions to 15 degrees for rapid chip removal and reduced heat buildup
• 135-degree split point tip for self-starting cuts with no walking
• Cobalt steel construction for extended life in hard metal applications
• Chip-breaker geometry limits heat accumulation during extended drilling cycles
• Secure-grip shank geometry helps prevent slipping in the chuck
• Metric sizing for compatibility with metric-specification work

Compatibility

Designed as a jobber-length twist drill bit for use in standard keyed and keyless drill chucks compatible with the bit shank diameter; suitable for all general twist drilling applications in hard and soft metals.

Installation Notes

This bit is installed by a qualified tradesperson or machinist into a compatible drill chuck. Secure the bit firmly in the chuck before operation and verify the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life and manage heat. Inspect the cutting edge before each use and replace the bit if chipping or excessive wear is observed.

Technical Specifications

• Cutting Length: 2.2 inches
• Overall Length: 5.7 inches
• Width: 1.85 inches
• Height: 0.1 inches
• Weight: 0.02 pounds
• Point Angle: 135 degrees split point
• Helix Angle: 35 degrees transitioning to 15 degrees
• Sizing Standard: Metric
• Unit of Measure: Each
• UPC: 045242519347

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2504