Accupro 4500365 Screw Machine Drill Bit 37/64 Inch Carbide

Product Description

The ACCUPRO 4500365 is a screw machine length drill bit engineered for high-performance drilling in demanding materials. It features a solid carbide construction with a TiAlN (titanium aluminum nitride) coating that extends tool life in abrasive and high-heat applications. The 140-degree web-thinned point reduces thrust, improves chip evacuation, and aids self-centering on entry. At 5.512 inches overall length with a 2.953-inch flute length, this is a stub-length format that maximizes rigidity and minimizes deflection. The straight cylindrical shank measures 0.5781 inches in diameter, matching the bit diameter for direct chuck mounting. Two regular spiral flutes handle chip removal efficiently, and coolant-through capability supports high-speed production environments.

This drill bit is designed for cutting stainless steels and other difficult-to-machine metals where tool rigidity and heat resistance are critical. The screw machine length format is well suited for CNC machining centers, drill presses, and manual machine tools in shop environments where short overall length reduces runout and chatter. It fits applications in manufacturing, fabrication, and maintenance where precision hole quality in tough alloys is required. The 3xD flute-to-diameter ratio supports accurate hole geometry without the deflection risk of longer jobber-length tooling.

Key Features

• Solid carbide construction for maximum rigidity and wear resistance in hard materials
• TiAlN coating improves heat resistance and extends tool life in stainless steel and high-alloy workpieces
• 140-degree R-thinned web point reduces entry thrust and improves self-centering
• Coolant-through design supports high-speed and high-feed production drilling
• Screw machine (stub) length format minimizes deflection compared to jobber-length bits
• Right-hand cutting, regular spiral flutes for predictable chip flow and evacuation

Compatibility

Designed for use in CNC machining centers, drill presses, and machine tool spindles accepting a 0.5781-inch straight cylindrical shank. Primary workpiece material is stainless steels per ACCUPRO series ASSC140-TA-CL designation.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine powered down and locked out per applicable safety procedures. Ensure the chuck or collet is rated for the shank diameter before seating the bit. Coolant-through setups require proper coolant pressure and flow to the spindle before commencing a cut. Do not use this bit in hand-held drills; it is intended for rigid machine tool setups only.