Precision Twist Drill 5997118 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997118 is a taper length drill bit engineered for heavy-duty drilling in a wide range of metallic and non-metallic materials. Built from high speed steel (HSS) with a bright, uncoated finish, this bit carries a wire size 42 designation with a decimal diameter of 0.0935 inches. The 135-degree split point allows self-centering entry without a center punch, reducing walking on hard or smooth surfaces. The parabolic flute geometry, rated at a 6xD flute-to-diameter ratio, promotes efficient chip evacuation during deeper passes. Machinists, tool-and-die tradespeople, and maintenance technicians are the primary users of this style of bit.

This drill bit is suited for general-purpose and precision hole-making in production and maintenance environments. The taper length body provides greater reach than a jobber-length bit while maintaining rigidity. The straight shank seats in standard drill chucks and collet holders without modification. Material compatibility spans ferrous and non-ferrous metals including alloy steel, carbon steel, stainless steel, hardened steel, tempered steel, cast iron, malleable iron, aluminum, aluminum alloy, brass, bronze, copper, nickel, titanium, titanium alloy, magnesium, magnesium alloy, and graphite. This breadth of application makes the bit a practical general inventory item for shops running varied stock materials.

Key Features

• Wire size 42 with a decimal diameter of 0.0935 inches for precise hole sizing
• 135-degree split point with web thinning for self-centering, low-thrust entry
• Parabolic flute design at a 6xD ratio for fast chip removal in deep holes
• High speed steel construction rated for heavy-duty use across a broad material range
• Tapered web configuration adds rigidity and reduces deflection during cutting
• Right-hand cut, straight shank fits standard drill chucks and collet systems
• Meets ANSI standards for drill geometry and dimensional tolerances

Compatibility

Designed as a general-purpose taper length drill bit compatible with any standard drill press, CNC machining center, or hand drill equipped with a chuck or collet sized to accept a 0.0935-inch straight shank. No specific OEM system restrictions apply.

Installation Notes

Secure the shank fully in the chuck or collet before beginning any drilling operation and verify runout is within acceptable tolerance for the application. Use appropriate cutting fluid or coolant for the workpiece material, particularly when drilling stainless steel, titanium, or hardened steel, to manage heat buildup and extend tool life. Always clamp the workpiece securely and select a feed rate and spindle speed appropriate for the material and bit diameter. Inspect the cutting edges for wear before each use and replace the bit if chipping or significant dulling is observed.