Precision Twist Drill 5995718 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5995718 is a cobalt taper length drill bit designed for heavy-duty drilling applications across a wide range of materials. It measures 0.1990 inches in diameter (Wire Size 8) with a 6-inch overall length and a 3-5/8-inch flute length. The 135-degree split point is web-thinned for self-centering entry, reducing the need for a center punch and minimizing walking on hard or smooth surfaces. The straight shank and right-hand spiral flute design work with standard drill chucks and conventional drill presses, CNC machines, and hand-held power tools. Machinists, fabricators, and maintenance mechanics are the primary users of this bit.

This bit is built for demanding drilling tasks on metals and other challenging materials. The cobalt construction handles elevated cutting temperatures that would degrade standard high-speed steel bits, making it suitable for stainless steel, hardened steel, nickel alloys, cast iron, and other abrasion-resistant materials. It also performs well on aluminum, brass, bronze, copper, magnesium alloys, and reinforced plastics. The M52CO series designation indicates a coated cobalt formulation intended for high-performance, production-rate drilling where tool life and hole quality matter.

Key Features

• Cobalt tool material rated for heavy-duty cutting performance on hard and abrasion-resistant materials
• 135-degree split point with web thinning for self-centering, reduced thrust, and clean entry
• Tapered web configuration adds rigidity along the flute length
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Straight shank at 0.1990 inches diameter fits standard drill chucks without adapters
• ANSI-standard geometry for consistent dimensional interchangeability

Compatibility

Designed as an OEM-style replacement or direct-use taper length drill bit for standard drill chucks and collet systems accepting a 0.1990-inch straight shank, conforming to ANSI standards for taper length jobber-style tooling.

Installation Notes

Install and remove this bit with the machine fully powered down and the spindle locked. Secure the straight shank firmly in the chuck or collet before operation to prevent runout. Use appropriate cutting fluid or coolant for the material being drilled to extend tool life, particularly when working with stainless steel or nickel alloys. Follow applicable shop safety standards and machine manufacturer guidelines for speeds and feeds based on material type and hole depth.