Precision Twist Drill 5996354 Taper Length Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5996354 is a taper length cobalt drill bit designed for high-performance drilling in a wide range of metals and materials. Built to the M51CO series specification, it features a 27/64 inch diameter with a 135-degree split point that reduces walking and enables self-centering entry without a center punch. The cobalt construction with gold oxide finish provides heat resistance and extended tool life when drilling hard or abrasive materials. A tapered web configuration and web-thinned geometry reduce cutting force and improve chip evacuation. This bit is suited for production shops, maintenance facilities, and any trade professional drilling into tough stock.

This drill bit is intended for use in metalworking, fabrication, and industrial maintenance applications where standard high-speed steel bits fall short. The 27/64 inch straight cylindrical shank fits standard drill chucks without modification. With a 4-5/8 inch flute length and 7-1/4 inch overall length, it provides the reach needed for deeper holes in plate stock, structural sections, and heavy-wall tubing. The right-hand spiral flute and regular helix angle suit a broad range of materials including stainless steel, alloy steel, cast iron, brass, bronze, copper, aluminum, and reinforced plastics.

Key Features

• Cobalt tool material with gold oxide coating for heat and wear resistance in hard metals
• 135-degree split point with web-thinned, tapered web for self-centering entry and reduced thrust
• 4-5/8 inch flute length at a 6xD ratio provides chip clearance on deeper holes
• Right-hand cut, spiral flute geometry compatible with standard drill presses and hand drills
• Straight cylindrical shank at 27/64 inch fits common three-jaw chucks without adapters
• ANSI standard compliant; heavy-duty grade rated for high-performance and production use

Compatibility

Designed as an OEM-style replacement or direct-use taper length drill bit for standard drill press chucks, magnetic base drills, and hand-held power drills accepting a 27/64 inch straight cylindrical shank.

Installation Notes

Install and remove this bit with the drill unplugged or the machine locked out per applicable safety procedures. Secure the straight shank fully in the chuck and tighten with a chuck key before operation. Use cutting fluid or coolant where the material and machine setup allow, particularly when drilling stainless steel or hardened alloys, to preserve tool life. Follow shop safety standards and wear appropriate eye protection during all drilling operations.