Precision Twist Drill 5995693 Cobalt Drill Bit 0.1285 in

Product Description

The PRECISION TWIST DRILL 5995693 is a taper length cobalt drill bit designed for high-performance drilling in tough and demanding materials. Built to wire size 30 (0.1285 inches diameter), this bit features a 135-degree split point for self-centering starts without a center punch. The cobalt tool material provides heat and wear resistance beyond standard high-speed steel, making it suitable for stainless steel, hardened steel, nickel alloys, and other difficult-to-machine materials. With a 3-inch flute length and 5-3/8-inch overall length, this bit falls into the taper length category, offering greater reach than jobber-length bits while maintaining rigidity. It is sold individually.

This bit is suited for use in machine shop environments, maintenance and repair operations, and fabrication work where a broad range of materials must be drilled. Its heavy-duty grade and cobalt construction make it a reliable choice for drilling alloy steel, carbon steel, cast iron, stainless steel, brass, bronze, copper, aluminum, aluminum alloy, magnesium, nickel, nickel alloys, high-strength bronze, malleable iron, cermet, graphite, and reinforced plastics. The right-hand spiral flute and straight shank are compatible with standard drill chucks and CNC spindles alike.

Key Features

• Cobalt tool material for extended heat and wear resistance in hard and abrasive materials
• 135-degree split point provides self-centering capability and reduces walking on entry
• Taper length body with 3-inch flute and 5-3/8-inch overall length for added reach
• Web-thinned tapered web reduces thrust and improves chip clearance
• Right-hand cut with regular spiral flute and straight shank fits standard chucks
• ANSI-standard construction for consistent sizing and interchangeability

Compatibility

Designed as an OEM-style taper length drill bit in the M52CO series, compatible with standard straight-shank drill chucks and CNC machine spindles accepting a 0.1285-inch shank diameter.

Installation Notes

This bit is installed by machinists, tool-and-die workers, and maintenance technicians using standard drill chucks or CNC toolholders. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the straight shank fully in the chuck to the depth of the chuck jaws to prevent runout and bit pullout under load. Use appropriate cutting fluid or coolant when drilling stainless steel, nickel alloys, or hardened materials to extend tool life.