Precision Twist Drill 5995837 Letter Y Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5995837 is a letter Y jobber-length drill bit designed for precision drilling in demanding industrial and trade applications. Built from M2 high-speed steel with a straw (bronze) coating, it features a 135-degree split point that reduces walking and cuts through material with less feed pressure than a standard 118-degree point. The web-thinned, tapered-web construction reduces thrust load at the center of the bit. At 5.25 inches overall length with a 3.875-inch flute, this is a general-purpose heavy-duty tool suited for machinists, maintenance techs, and fabricators working across a range of materials.

This drill bit is rated for use in high-temperature alloys and carries primary workpiece material codes P, M, K, and S, covering steels, stainless steels, cast iron, and heat-resistant superalloys. The right-hand, regular spiral flute geometry promotes efficient chip evacuation in these materials. It is a straight-shank, two-flute configuration compatible with standard drill chucks and collet systems, making it practical for both bench drill presses and hand-held power tools in shop and field settings.

Key Features

• Letter Y size — 0.404 inches decimal diameter for close-tolerance hole sizing
• 135-degree split point reduces bit walking and lowers required feed pressure
• M2 high-speed steel construction with straw bronze coating for heat resistance and surface protection
• Web-thinned, tapered-web design reduces drilling thrust at center
• Regular spiral, right-hand flute geometry for efficient chip clearance
• Rated for high-temperature alloy workpieces including steels, stainless steels, cast iron, and superalloys

Compatibility

Part of the HX10-HX15-HX18 series. Designed as an OEM-style replacement or stock drill bit for applications requiring a letter Y diameter straight-shank jobber drill in ANSI-standard sizing.

Installation Notes

Installed by machinists, maintenance technicians, and fabricators using standard keyed or keyless drill chucks. Secure the shank fully in the chuck before use and confirm the bit runs true before cutting. Always wear appropriate eye protection and secure the workpiece to prevent movement during drilling. Allow the bit to cool between heavy cuts when drilling hard or heat-sensitive alloys to preserve the cutting edge.