Precision Twist Drill 5996411 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5996411 is a cobalt taper length drill bit engineered for heavy-duty drilling in tough and abrasive materials. Ground to a 135-degree split point with web thinning, it starts on contact without a center punch and cuts through hardened steel, stainless steel, cast iron, and nonferrous alloys with minimal walking. The straight cylindrical shank measures 0.1890 inches in diameter, matching the No. 12 wire gauge designation and a decimal size of 0.1890 inches. A gold oxide coating provides lubricity and heat resistance during high-feed drilling operations. This bit is sold individually and conforms to ANSI standards.

This taper length drill bit is suited for metalworking, fabrication, and maintenance applications where a longer flute than a jobber-length bit is required to reach deeper hole depths. The 3-5/8 inch flute and 6 inch overall length give it reach into recessed bores and structural members. It performs in manual drill presses, CNC machining centers, and hand-held drilling equipment. Material applications include alloy steel, aluminum and aluminum alloys, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, high-strength bronze, magnesium and magnesium alloys, malleable iron, nickel and nickel alloys, reinforced plastics, stainless steel, and cermet.

Key Features

• 135-degree split point with web thinning for self-centering starts and reduced thrust
• Cobalt tool material with gold oxide finish for heat resistance in hard and abrasive materials
• Taper length body with 3-5/8 inch flute provides extended reach over standard jobber bits
• Straight cylindrical shank fits standard drill chucks without adapters
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Conforms to ANSI standards; rated for heavy-duty, high-performance applications

Compatibility

Designed as an OEM-style replacement and standard fitment for No. 12 wire gauge taper length drill bit applications conforming to ANSI specifications across drill presses, machining centers, and hand-held power tools accepting a 0.1890-inch straight cylindrical shank.

Installation Notes

Installation and use of this bit should be performed by a qualified machinist or trained trade professional. Secure the straight shank firmly in a properly sized drill chuck before operation, and confirm chuck runout is within acceptable tolerance to avoid premature edge wear. Always wear appropriate personal protective equipment, including eye protection and cut-resistant gloves, when handling or operating drill bits. Follow the machine manufacturer's recommended speed and feed charts for cobalt tooling in the specific workpiece material.