Milwaukee 48-89-4821 Titanium Jobber Drill Bit Impact Duty

Product Description

The MILWAUKEE 48-89-4821 is a titanium-coated jobber length drill bit engineered for use with both impact drivers and standard drills. It features a variable helix design that starts at an aggressive 35-degree angle and transitions to 15 degrees, promoting rapid chip evacuation and reducing heat buildup during extended drilling operations. The 135-degree split point tip provides a precise, self-centering start that eliminates walking on hard surfaces. The titanium coating extends service life up to three times longer compared to standard black oxide drill bits. This bit is suited for metal fabrication, mechanical work, and general trade drilling tasks where bit longevity and hole accuracy are priorities.

This drill bit is designed for trade professionals including electricians, plumbers, HVAC technicians, and pipefitters who drill through metal, wood, and composite materials on the jobsite. The impact-duty construction handles the high-torque output of power impact drivers without premature tip wear or shank failure. Metric sizing makes it compatible with metric-spec applications. The jobber length format fits standard drill chucks and quick-change chuck systems commonly used in the trades.

Key Features

• Titanium coating provides up to 3x service life versus black oxide drill bits
• Variable helix design transitions from 35 degrees to 15 degrees for rapid chip removal and reduced heat
• 135-degree split point tip eliminates walking and delivers accurate hole starts
• Impact-duty construction engineered to withstand high-torque output from power impact drivers
• Chip breaker geometry further limits heat buildup during continuous drilling
• Metric sizing for metric-spec drilling applications

Compatibility

Designed as an impact-duty replacement-style jobber drill bit compatible with standard 3-jaw drill chucks and quick-change chuck systems on corded and cordless drills and impact drivers.

Installation Notes

Installation of this drill bit requires no special tools beyond the host drill or impact driver. Ensure the shank is fully seated and the chuck is tightened securely before operation. Always wear appropriate eye protection when drilling metal or composite materials. Follow applicable OSHA and site safety requirements for rotating tool use.

Technical Specifications

• Coating: Titanium
• Point Angle: 135 degrees split point
• Helix Angle: Variable, 35 degrees to 15 degrees
• Sizing Standard: Metric
• Length: 7.75 inches
• Width: 1.85 inches
• Height: 0.45 inches
• Weight: 0.09 pounds
• UOM: Each

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-4821