Precision Twist Drill 5997135 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997135 is a taper length, straight-shank drill bit engineered for heavy-duty general-purpose drilling across a wide range of metals and alloys. Built from high-speed steel (HSS) with a bright, uncoated finish, this wire gauge #46 bit measures 0.0810 inches in diameter. The 135-degree split point reduces walking on contact and minimizes the need for a center punch. A parabolic flute geometry at a 6xD ratio promotes aggressive chip evacuation, helping maintain cutting speed and bit life during deep-hole drilling operations in production and maintenance environments.

This bit is suited for drilling alloy steel, carbon steel, stainless steel, cast iron, malleable iron, hardened steel, tempered steel, aluminum, aluminum alloys, brass, bronze, copper, magnesium, magnesium alloys, nickel, titanium, titanium alloys, and graphite. The taper length design provides greater reach than a jobber-length bit, making it well-suited for applications where standard-length bits fall short. Typical users include machinists, maintenance technicians, and fabricators working in shop, field, or production settings.

Key Features

• Wire gauge #46 diameter — 0.0810 inches for precise small-diameter hole work
• 135-degree split point for self-centering entry and reduced thrust force
• Parabolic flute profile at 6xD ratio for efficient chip removal in deep cuts
• High-speed steel construction rated for heavy-duty use across ferrous and non-ferrous materials
• Web-thinned, tapered web configuration reduces cutting resistance
• Right-hand cut, straight shank — compatible with standard drill chucks
• Meets ANSI standards for dimensional consistency

Compatibility

Designed as a general-purpose taper length drill bit compatible with any standard drill chuck or drill press that accepts a 0.0810-inch straight shank. Suitable for use with conventional and CNC drilling equipment.

Installation Notes

Install and remove only with the spindle fully stopped and the machine de-energized or properly locked out per applicable lockout/tagout procedures. Secure the straight shank firmly in the chuck before operation to prevent slipping under torque. Use appropriate cutting fluid or coolant for ferrous materials to extend bit life, noting that this bit does not support coolant-through delivery. Inspect the cutting edges for wear or chipping before each use, especially when drilling hardened or abrasive materials.