Accupro 63310478 Carbide Jobber Drill Bit 7mm Altin

Product Description

The ACCUPRO 63310478 is a solid carbide jobber-length drill bit designed for high-performance drilling in hard and abrasive materials. It measures 7 mm in diameter with an overall length of 75 mm and a flute length of 35 mm. The bit features an AlTiN (Aluminum Titanium Nitride) coating that increases surface hardness and heat resistance, extending tool life in demanding applications. A 140-degree notched point reduces thrust force and improves self-centering on entry. The straight-cylindrical shank measures 8 mm in diameter, compatible with standard drill chucks and collet holders. Right-hand spiral flutes with a regular helix promote efficient chip evacuation during the cut.

This drill bit is suited for machining hardened steels, stainless steels, cast iron, and high-temperature alloys in both production and job-shop environments. The 4xD flute-to-diameter ratio and web-thinned, parallel-web construction make it a practical choice for CNC machining centers, drill presses, and manual operations where dimensional accuracy and hole quality are priorities. Maximum recommended drilling depth is 28 mm. It is typically selected by machinists, tool-and-die makers, and maintenance technicians working with ferrous and exotic materials.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN coating increases surface hardness and reduces heat buildup at the cutting edge
• 140-degree notched point lowers entry thrust and improves self-centering
• Web-thinned parallel web reduces cutting resistance and improves chip flow
• Regular right-hand spiral flutes with 4xD ratio for efficient chip evacuation
• Straight-cylindrical 8 mm shank fits standard chucks and collet systems

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard drill chucks and collet holders accepting an 8 mm straight-cylindrical shank, suitable for CNC and manual drilling equipment.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with cutting tool safety and machine setup. Secure the shank fully in the chuck or collet to the recommended engagement depth before operation. Ensure the spindle and workpiece are properly fixtured before starting the cut. Use appropriate cutting fluid or coolant as required by the workpiece material and machine specifications.