Precision Twist Drill 5995706 Taper Length Cobalt Drill Bit

Product Description

The PRECISION TWIST DRILL 5995706 is a taper length cobalt drill bit in wire gauge size No. 39, equivalent to 0.0995 inches in diameter. Built to the M52CO series specification, it features a 135-degree split point that reduces walking and allows self-centering entry without a center punch. The gold oxide coating helps resist heat buildup during aggressive drilling cycles. With a flute length of 2.5 inches and an overall length of 4.625 inches, this bit offers extended reach compared to jobber-length equivalents. It is suited for machinists, maintenance technicians, and fabricators working in high-production or difficult-material environments.

This bit is designed for use across a broad range of materials including 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, cermet, graphite, and reinforced plastic. The taper length body makes it well suited for applications requiring deeper hole penetration than a standard jobber bit provides. It is commonly used in machine shop production, structural fabrication, and general metalworking operations where consistent, repeatable hole quality is required.

Key Features

• Wire gauge No. 39 size — 0.0995 inches diameter for precise hole tolerances
• 135-degree split point for self-centering entry and reduced thrust force
• Cobalt tool material with gold oxide finish for extended heat resistance and tool life
• Taper length body with 2.5-inch flute length provides greater reach than jobber-length 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

Compatibility

Designed as a heavy-duty, ANSI-standard taper length drill bit compatible with any standard drill chuck or collet accepting a 0.0995-inch straight cylindrical shank. Rated for use in alloy steel, stainless steel, hardened steel, cast iron, aluminum, brass, bronze, copper, nickel alloys, magnesium, cermet, graphite, and reinforced plastic per manufacturer material application data.

Installation Notes

Installation and use should be performed by qualified machinists or tool operators familiar with drill press, mill, or hand-drill operation. Ensure the workpiece is securely clamped and the chuck or collet is fully tightened before initiating a cut. Use appropriate cutting fluid or coolant for the target material to maximize tool life, noting that this bit does not support coolant-through configurations. Inspect the drill point for wear or chipping before each use and replace the bit if the split point shows damage that could cause deflection or oversized holes.