Accupro 4500305 Screw Machine Drill Bit 3/16 in Carbide

Product Description

The ACCUPRO 4500305 is a screw machine length drill bit engineered for high-performance drilling in demanding materials. It features a 3/16 inch (0.1875 inch decimal) diameter, a 140-degree web-thinned point, and a solid carbide construction with a TiAlN coating for extended tool life and heat resistance. The overall length is 3.543 inches with a 1.575-inch flute length and a straight cylindrical shank measuring 0.2344 inches in diameter. Designed for a 3xD flute-to-diameter ratio, this bit delivers controlled chip evacuation and consistent hole quality. It is suited for use in CNC machining centers, drill presses, and production environments where precision and durability are required.

This drill bit is rated for primary use in stainless steels, making it a practical choice for fabrication shops, mechanical contractors, and machinists working with corrosion-resistant alloys. The screw machine length profile keeps the tool short and rigid, reducing deflection during entry. Coolant-through capability allows shops running high-pressure coolant systems to extend tool life and maintain tight tolerances on deep or interrupted cuts. Right-hand cutting direction is standard for conventional spindle rotation setups.

Key Features

• Solid carbide construction with TiAlN coating for heat and wear resistance in stainless steel applications
• 140-degree web-thinned point reduces thrust and improves self-centering on tough materials
• Coolant-through design compatible with high-pressure through-spindle coolant systems
• Screw machine length body provides rigidity and minimizes deflection in short-reach applications
• 3xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes
• Straight cylindrical shank fits standard drill chucks and collet holders

Compatibility

Designed as a high-performance replacement-style drill bit for use in standard straight-shank drill chucks and collet systems across CNC machining centers, drill presses, and similar equipment. Optimized for stainless steel workpiece materials per the manufacturer specification.

Installation Notes

Installation and use should be performed by qualified machinists or tool and die professionals. Ensure the machine spindle is fully stopped and locked out before changing or seating the bit. Confirm shank diameter compatibility with the chuck or collet before tightening to manufacturer-specified clamping torque for that workholding system. When using coolant-through capability, verify that the machine spindle supports through-spindle coolant delivery before engaging high-pressure flow.