Accupro 63310239 Solid Carbide Jobber Drill Bit No. 43

Product Description

The ACCUPRO 63310239 is a solid carbide jobber-length drill bit sized to wire gauge No. 43 (0.0890 inches) with a 140-degree notched point angle. It carries an AlTiN (aluminum titanium nitride) coating for heat resistance and extended tool life in high-speed drilling applications. The overall length is 2 inches, with a flute length of 0.595 inches and a straight cylindrical shank measuring 1/8 inch in diameter. Right-hand cut with a regular spiral flute and web-thinned, parallel-web construction, this bit is built for precision work in hard and abrasive materials. It is installed and used by machinists, tool-and-die professionals, and production drilling operations.

This bit suits small-diameter drilling in ferrous metals, stainless steel, cast iron, hardened alloys, and similar hard workpiece materials where carbide outperforms high-speed steel. The 4xD flute-by-diameter ratio and 140-degree split point reduce thrust and walking on entry, making it appropriate for close-tolerance work on CNC machining centers, drill presses, and manual mills. Maximum drilling depth is 0.480 inches. The AlTiN coating supports dry or minimal-lubrication cutting at elevated temperatures without coolant-through capability.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN coating provides thermal protection and reduces friction at the cutting edge
• 140-degree notched point angle reduces thrust and self-centers on entry
• Web-thinned parallel web lowers cutting force requirements
• Straight cylindrical 1/8-inch shank fits standard collets and chucks without adapters
• Regular spiral flute with 4xD ratio provides efficient chip evacuation at this diameter

Compatibility

Designed for use in CNC machining centers, drill presses, and milling machines equipped with collets or drill chucks accepting a 1/8-inch straight cylindrical shank. Suitable for wire gauge No. 43 hole requirements across general precision machining applications.

Installation Notes

Secure the shank fully in a collet or chuck before operation and verify runout is within acceptable limits for the intended tolerance. Solid carbide bits are brittle compared to high-speed steel — avoid side loading, peck aggressively when chips pack, and do not use in hand-held drills where flex and wobble can cause fracture. Power down and lock out the machine spindle before changing or inspecting tooling. Follow shop safety standards and machine manufacturer feed-and-speed recommendations for carbide tooling at this diameter.