Accupro 77711976 1/8 Inch Carbide Drill Bit Altin 140

Product Description

The ACCUPRO 77711976 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding materials. Ground to a 140-degree split point with web thinning, it reduces thrust and improves center-starting accuracy without a center punch. The AlTiN coating adds heat resistance and surface hardness, extending tool life in abrasive and high-temperature applications. At 0.125 inches in diameter and 68 millimeters overall length, this bit is built for precision work in metal fabrication, machining, and maintenance trades where tight tolerances and consistent hole quality are required.

This drill bit fits standard jobber-length applications across CNC machining centers, drill presses, and hand-held power tools with compatible chucks. The straight cylindrical shank seats securely in keyless or keyed chucks. With a 5xD flute-to-diameter ratio and a regular spiral, it handles chip evacuation effectively in through-hole and blind-hole configurations. It is well-suited for machinists, tool-and-die techs, and maintenance mechanics working with steel, stainless steel, cast iron, and other ferrous and hard materials.

Key Features

• Solid carbide construction for rigidity and heat resistance in hard materials
• AlTiN coating improves surface hardness and extends tool life in abrasive applications
• 140-degree drill point angle with web thinning reduces entry thrust and improves self-centering
• Coolant-through design supports internal coolant delivery for deep or high-speed drilling
• 2-flute right-hand spiral configuration optimizes chip evacuation
• Diameter tolerance of -0.0005 to 0.0000 inches ensures consistent, close-tolerance holes

Compatibility

Designed as a jobber-length replacement or production drill bit for use in standard 1/8 inch chuck or collet setups across CNC and manual drilling equipment.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician. Ensure the machine spindle is fully stopped and the tool is secured with appropriate torque in the chuck or collet before operation. Verify coolant-through connections are properly configured before engaging internal coolant flow. Inspect the cutting edge for chipping or wear before each use, as carbide tools can fracture if run in damaged condition.