Accupro 4500570 Taper Length Drill Bit 7/16 in Carbide

Product Description

The ACCUPRO 4500570 is a taper length solid carbide drill bit designed for high-performance drilling in demanding materials. It carries a 140-degree split point geometry with R-thinned web for reduced thrust and cleaner entry. The TiAlN coating provides heat resistance and extended tool life in abrasive and high-temperature cutting environments. At 0.4375 inches (7/16 inch) in diameter with an 8xD flute-to-diameter ratio, this bit is built for deep-hole applications where rigidity and chip evacuation are critical. Coolant-through capability allows internal coolant delivery directly to the cutting zone, making it suitable for production and high-cycle drilling operations. Licensed machinists and tooling specialists are the primary end users.

This drill bit is engineered for applications involving stainless steel and other hard, work-hardening materials. The spiral flute configuration with right-hand cut suits vertical machining centers, CNC lathes, and drill presses where precision hole quality and concentricity matter. The straight cylindrical shank at 12.00 mm diameter fits standard collet chucks and drill chucks used in both production and job-shop environments. The 114 mm flute length accommodates the deeper reach requirements typical of taper length drilling without sacrificing chip clearance.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• TiAlN coating extends tool life in high-heat, high-speed cutting conditions
• 140-degree point angle with R-thinned web reduces thrust and improves centering
• Coolant-through design delivers cutting fluid directly to the tip for thermal control
• 8xD flute-to-diameter ratio supports deep-hole drilling with consistent chip evacuation
• Right-hand spiral flute with straight cylindrical shank for broad machine compatibility

Compatibility

Rated for stainless steel material application. Fits standard collet and drill chuck systems accepting a 12.00 mm straight cylindrical shank. Designed as a high-performance taper length replacement suitable for CNC machining centers and manual drill presses configured for solid carbide tooling.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle and chuck are fully powered down and locked out before mounting or removing the bit. Confirm the collet or chuck is rated for the 12.00 mm shank diameter and that runout is within acceptable tolerance before beginning a cut. When using the coolant-through feature, verify that the machine's internal coolant system pressure is compatible with the tool path and workpiece fixture before cycling the spindle.