Accupro 77711943 Carbide Jobber Drill Letter U 0.368 in

Product Description

The ACCUPRO 77711943 is a solid carbide jobber-length drill bit sized to Letter U (0.3680 inches) with a 140-degree split-point geometry and an AlTiN (aluminum titanium nitride) coating. It is designed for high-performance drilling in ferrous and hardened materials where carbide rigidity and heat resistance are required. The web-thinned, tapered-web point reduces entry thrust and improves self-centering. With a 10 mm straight cylindrical shank and right-hand cutting direction, this drill fits standard drill chucks and CNC machining centers. It is used by machinists, toolmakers, and metalworking professionals in production and job-shop environments.

This drill is suited for through-hole and blind-hole drilling in steel, cast iron, stainless steel, and similar hard materials. The AlTiN coating extends tool life at elevated cutting temperatures, making it appropriate for dry or minimal-lubrication machining. The regular spiral flute promotes efficient chip evacuation in deep-hole applications. Coolant-through capability allows internal coolant delivery for deeper bore work where surface cooling is insufficient. Typical applications include precision hole drilling on CNC mills and drill presses in automotive, aerospace, and general metalworking production.

Key Features

• Letter U size at 0.3680 inches diameter with a tight tolerance of -0.0005 to 0.0000 inches
• 140-degree point angle with web-thinned, tapered-web geometry for reduced entry thrust
• AlTiN coating for high heat resistance and extended tool life in ferrous materials
• Coolant-through design supports internal coolant delivery for deeper holes
• Right-hand cut, regular spiral flute with 2-flute configuration for efficient chip removal
• Straight cylindrical shank compatible with standard drill chucks and collet holders

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for standard drill chucks, collet systems, and CNC tool holders accepting a 10 mm straight shank jobber drill.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the shank to the full recommended engagement depth in the chuck or collet to prevent pullout under cutting load. Verify spindle speed and feed rate are set to values appropriate for solid carbide tooling in the workpiece material before starting the cut.