Precision Twist Drill 5995795 Letter X Hss Drill Bit

Product Description

The PRECISION TWIST DRILL 5995795 is a jobber-length drill bit sized at Letter X (0.3970 inches) with a 135-degree split-point tip geometry and a web-thinned design for reduced thrust during entry. The cutting edges are ground from M2 high speed steel and finished with a purple/bronze coating that provides moderate heat and wear resistance. At 5.125 inches overall length with a 3.75-inch spiral flute, this bit falls within the standard jobber-length profile that machinists, maintenance mechanics, and metalworking trades rely on for general-purpose hole-making in production and repair environments.

This bit is suited for drilling steel, stainless steel, cast iron, superalloys, and titanium in both shop and field applications. The straight-cylindrical shank fits standard three-jaw drill chucks on drill presses, hand-held power drills, and CNC drilling stations. Its 9xD flute-to-diameter ratio and tapered web configuration make it a practical choice for through-hole and blind-hole work at moderate spindle speeds with conventional cutting fluids.

Key Features

• Letter X size: 0.3970 inches diameter for precise dimensional fit
• 135-degree split-point angle with web thinning reduces walking and entry thrust
• M2 high speed steel construction handles steel, stainless, cast iron, superalloys, and titanium
• Purple/bronze coating adds surface hardness and mild lubricity
• 2-flute regular spiral design provides efficient chip evacuation
• Straight-cylindrical shank seats securely in standard drill chucks
• ANSI-specification ground geometry ensures dimensional consistency

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw drill chuck sized to accept a 0.3970-inch straight-cylindrical shank. Fits drill presses, hand-held power drills, and CNC drilling equipment without adapters.

Installation Notes

Secure the shank fully in the chuck before operation and verify runout is within acceptable tolerance before drilling production holes. Apply cutting fluid appropriate for the workpiece material — sulfurized oil for steel and cast iron, a water-soluble coolant for stainless and titanium — to extend edge life and manage heat. Operate at spindle speeds consistent with published SFM tables for the workpiece material and bit diameter. Do not use this bit for drilling masonry, wood, or abrasive composites.