Accupro 77712354 Carbide Drill Bit 5/16 Inch Altin

Product Description

The ACCUPRO 77712354 is a solid carbide jobber length drill bit designed for high-performance drilling in demanding applications. It measures 5/16 inch (0.3125 inch) in diameter with a 140-degree drill point angle optimized for fast, accurate entry with minimal thrust. The AlTiN (aluminum titanium nitride) coating extends tool life in abrasive and high-heat environments. With a 3.78-inch (96 mm) overall length and a spiral flute geometry, this bit handles a maximum drilling depth of 1.563 inches. It is suited for machinists, maintenance technicians, and fabricators working in production or job shop environments.

This drill bit is intended for use in CNC machining centers, drill presses, and handheld power tools capable of accepting a straight-cylindrical shank. The 5xD flute-to-diameter ratio and web-thinned, tapered web configuration make it well suited for drilling in steel, stainless steel, cast iron, and other ferrous or non-ferrous metals. Coolant-through capability supports high-speed production drilling where chip evacuation and heat control are critical. The right-hand spiral flute with regular spiral type provides consistent chip removal during through-hole and blind-hole operations.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN coating for extended tool life in high-temperature cutting conditions
• 140-degree drill point angle reduces thrust and improves hole entry accuracy
• Coolant-through design supports high-speed production drilling and chip evacuation
• Web-thinned tapered web reduces cutting forces at the drill tip
• Straight-cylindrical shank fits standard collets and drill chucks

Compatibility

Designed as a jobber length replacement or production drill bit for any machine or handheld tool accepting a straight-cylindrical shank in the 5/16 inch diameter range, including CNC machining centers and standard drill presses.

Installation Notes

Install in a compatible collet or drill chuck rated for the shank diameter before powering the machine. Confirm spindle speed and feed rate are appropriate for the workpiece material and bit diameter before beginning the cut. Use cutting fluid or coolant to maximize the coolant-through capability and prolong coating life. Inspect the cutting edges and coating before each use and replace the bit if chipping or wear is observed.