Milwaukee 48-89-2508 Cobalt Red Helix Jobber Drill Bit 3 in

Product Description

The MILWAUKEE 48-89-2508 is a cobalt jobber-length drill bit built for hard metal drilling applications where durability and heat resistance are critical. It features a variable helix design that transitions from a 35-degree aggressive cutting angle down to 15 degrees, promoting rapid chip evacuation and limiting heat buildup at the cutting edge. The 135-degree split point tip provides a precise, self-centering start that eliminates walking on entry. At 3 inches in length and 0.04 pounds, this bit is sized for standard jobber-length applications across a wide range of metalworking tasks. Licensed tradespeople and metal fabricators rely on this bit for demanding, repetitive drilling in hard stock.

This drill bit is suited for use in hard metal applications including stainless steel, cast iron, and other tough alloys where standard high-speed steel bits fail prematurely. The cobalt construction provides elevated heat resistance, making it appropriate for production drilling environments as well as maintenance and repair work. The metric sizing on this bit makes it a fit for applications requiring precision metric hole dimensions. It is sold individually and compatible with standard drill chucks used in corded and cordless drill drivers and drill presses.

Key Features

• Variable helix geometry: 35-degree aggressive angle transitions to 15 degrees for rapid chip removal and reduced heat buildup
• 135-degree split point tip for a precision, no-walk start on hard metal surfaces
• Cobalt construction delivers extended service life in hard metal versus standard black oxide bits
• Chip breaker design helps reduce heat accumulation during prolonged drilling cycles
• Secure grip shank geometry helps prevent bit slippage in the chuck during operation
• Metric sizing for applications requiring precise metric hole dimensions

Compatibility

Designed for use in standard jobber-length drill chuck applications across corded and cordless drill drivers and drill presses where a metric-sized cobalt drill bit is required.

Installation Notes

This bit is installed by a machinist, maintenance technician, or trade professional using a keyed or keyless drill chuck. Secure the shank fully in the chuck before operation and confirm the bit is running true before contact with the workpiece. Use appropriate cutting fluid or lubricant when drilling hard metals to extend bit life and reduce heat. Inspect the cutting tip before each use and replace the bit if the edge shows signs of excessive wear or chipping.

Technical Specifications

• Bit Length: 3 inches
• Helix Angle: 35 degrees transitioning to 15 degrees
• Split Point Angle: 135 degrees
• Construction: Cobalt
• Package Dimensions: 5.75 x 1.9 x 0.25 inches
• Weight: 0.04 pounds
• Sold As: Each
• UPC: 045242519385

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2508