Precision Twist Drill 5995833 No. 31 Hss Jobber Drill

Product Description

The PRECISION TWIST DRILL 5995833 is a No. 31 wire-size jobber-length drill bit ground from high-speed steel (HSS) with a straw (bronze) coating. It carries a 135-degree split-point geometry with web thinning, which reduces walking on entry and lowers the thrust needed to start a hole without a center punch. The straight cylindrical shank measures 0.1200 inches in diameter, matching the drill diameter, and the overall length is 2.75 inches. Two regular-spiral flutes run 1.625 inches to evacuate chips efficiently. This bit is rated as a heavy-duty, general-purpose tool intended for use by machinists, maintenance technicians, and fabricators working with high-temperature alloys and similar materials.

The 5995833 is suited for production and maintenance drilling in ferrous and non-ferrous metals, including high-temp alloys designated under material codes P, M, K, and S. Its 14xD flute-to-diameter ratio and tapered web configuration support clean hole entry in both hand-held and machine-mounted setups. Typical applications include drill press work, CNC operations, and general-purpose bench drilling where a wire-gauge hole diameter of 0.1200 inches is required. The right-hand cutting direction is standard for conventional drill press and lathe use.

Key Features

• 135-degree standard split point with web thinning for self-centering entry and reduced thrust
• High-speed steel construction with straw (bronze) coating for heat resistance and surface lubricity
• Wire size No. 31 — 0.1200-inch diameter — straight cylindrical shank for universal chuck compatibility
• Two regular-spiral flutes, 1.625 inches long, for efficient chip evacuation
• Heavy-duty grade, general-purpose performance across high-temp alloy workpiece materials
• Meets ANSI specification standards; no coolant-through required

Compatibility

Designed for use in the HX10, HX15, and HX18 series applications; fits any standard drill chuck accepting a 0.1200-inch straight shank. Right-hand cutting direction only.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with rotating cutting tools. Secure the shank fully in the chuck and verify concentricity before starting the spindle. Always wear appropriate eye protection and ensure the workpiece is clamped or fixtured — never hand-hold small workpieces during drilling. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection.