Accupro 4500130 Carbide Jobber Drill 1/4 Inch Tialn

Product Description

The ACCUPRO 4500130 is a solid carbide jobber-length drill bit designed for drilling hardened materials in demanding production and maintenance environments. It measures 1/4 inch (0.2500 inches) in diameter with a 3-1/8 inch overall length and a 140-degree split-point geometry. The TiAlN coating provides thermal resistance and extended tool life when cutting through hardened steels and similarly tough workpiece materials. The UR-thinned web reduces thrust and improves chip evacuation at the point. This bit is sold individually and is suited for use by machinists, tool-and-die technicians, and maintenance professionals who require consistent performance in precision drilling applications.

This drill bit is intended for use in hardened materials, making it appropriate for tool-and-die work, mold and die maintenance, and production environments where standard HSS tooling is insufficient. The slow spiral flute configuration is optimized for harder workpiece materials, promoting controlled chip flow and reducing the risk of built-up edge. The straight cylindrical shank accepts standard drill chucks and collet holders in both manual and CNC machine tool setups.

Key Features

• Solid carbide construction provides rigidity and wear resistance in hardened material applications
• TiAlN coating improves thermal stability and extends tool life at elevated cutting temperatures
• 140-degree proprietary point angle reduces thrust and improves self-centering on entry
• UR-thinned web reduces cutting forces and promotes cleaner chip formation at the drill point
• Slow spiral flute geometry (4xD flute-to-diameter ratio) suited for short-chipping hardened materials
• Right-hand cutting direction with 2-flute configuration for standard CNC and manual drilling operations

Compatibility

Designed as an OEM-style jobber drill for use in standard 1/4 inch straight-shank drill chucks and collet holders on CNC machining centers, drill presses, and manual machine tools. Intended primary workpiece material is hardened steel and similarly hard materials per the manufacturer specification.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling technicians familiar with carbide tooling requirements. Carbide is brittle — avoid side loads, interrupted cuts at excessive feed rates, or use in machines with excessive spindle runout, as these conditions can cause chipping or catastrophic breakage. Ensure the machine spindle and chuck are clean and concentric before seating the shank. Coolant-through is not supported on this bit; use external flood or mist coolant where the application requires it.