Precision Twist Drill 5996395 Taper Length Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5996395 is a taper length cobalt drill bit designed for high-performance drilling in demanding industrial and trade applications. Built to Series M52CO specifications, this bit measures 0.2280 inches in diameter (No. 1 wire size) with a 3.75-inch flute length and an overall length of 6.125 inches. The 135-degree split point promotes self-centering entry and reduces the need for a center punch on most materials. Gold oxide finish and cobalt construction provide heat resistance and extended tool life when drilling hard or abrasive workpieces. This is a heavy-duty, right-hand spiral-flute bit with a straight cylindrical shank.

This bit is suited for metalworking, fabrication, and maintenance trades where a longer reach than a jobber-length bit is required. The taper length design gives more clearance in deep-hole applications while maintaining rigidity. Compatible material applications include alloy steel, carbon steel, stainless steel, hardened steel, cast iron, malleable iron, aluminum, aluminum alloy, brass, bronze, high-strength bronze, copper, nickel, nickel alloy, magnesium, magnesium alloy, reinforced plastic, cermet, and graphite. Machinists, pipefitters, ironworkers, and maintenance technicians commonly reach for this bit when jobber length falls short.

Key Features

• 135-degree split point for self-centering entry with reduced walking on entry
• Cobalt construction with gold oxide finish for heat resistance and durability in hard materials
• Taper length body at 6.125 inches OAL provides extended reach over standard jobber bits
• Right-hand spiral flute with web-thinned, tapered web configuration for efficient chip evacuation
• Straight cylindrical shank compatible with standard drill chucks and collets
• Meets ANSI standards; rated heavy-duty for high-performance applications

Compatibility

Designed as an OEM-style replacement or direct-use taper length drill bit for standard 3-jaw and collet-style chucks accepting a 0.2280-inch straight shank. Suitable for use in drill presses, CNC drilling machines, and handheld power drills configured for straight-shank tooling.

Installation Notes

Install into a compatible chuck and tighten securely with the appropriate chuck key before operation. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Use cutting fluid or coolant appropriate for the workpiece material when drilling stainless steel, hardened steel, or nickel alloys to extend bit life. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.