Accupro 4500109 Solid Carbide Jobber Drill 10.30 Mm

Product Description

The ACCUPRO 4500109 is a solid carbide jobber-length drill bit designed for high-performance drilling in hardened materials. It measures 10.30 mm (0.4055 inches) in diameter with a 140-degree proprietary point angle engineered to reduce walking and improve entry accuracy on tough workpieces. The TiAlN (Titanium Aluminum Nitride) coating provides thermal resistance and extended tool life under high-speed cutting conditions. Overall length is 111.00 mm (4.3701 inches), with a 63.00 mm (2.4803 inches) flute length. Installed by machinists and tool-and-die professionals, this drill is suited for CNC and manual drilling operations where hardened steel or similar materials are encountered.

This drill bit is optimized for hardened materials, where standard HSS tooling would fail prematurely. The slow spiral flute geometry reduces heat buildup and chip packing in difficult-to-machine workpieces. The straight cylindrical shank at 12 mm diameter fits standard drill chucks and collet systems. It is a right-hand cutting tool with a 4xD flute-to-diameter ratio and UR-thinned web, making it appropriate for precision production environments and job-shop applications requiring consistent hole quality in hardened stock.

Key Features

• Solid carbide construction for rigidity and wear resistance in hardened material drilling
• TiAlN coating improves heat resistance and extends cutting life at elevated speeds
• 140-degree proprietary point angle reduces drill walk and improves hole entry accuracy
• Slow spiral flute geometry minimizes heat buildup and controls chip evacuation
• UR-thinned web reduces thrust force and improves cutting efficiency
• Straight 12 mm shank is compatible with standard chucks and collet holders

Compatibility

Designed for use in hardened materials; fits standard drill chucks and collet systems accepting a 12 mm straight cylindrical shank. Drill bit size falls within the 10.00 mm to 12.50 mm range per DIN specification designation.

Installation Notes

Installation and use should be performed by qualified machinists familiar with carbide tooling requirements. Ensure the machine spindle and chuck are fully stopped and locked out before mounting or removing the drill bit. Carbide tooling is brittle — avoid side loading, interrupted cuts without proper feed adjustments, or dropping the bit on hard surfaces. Verify spindle runout is within acceptable tolerance before use to prevent premature breakage.