Precision Twist Drill 5995777 Jobber Drill Bit 19 Hss

Product Description

The PRECISION TWIST DRILL 5995777 is a jobber-length drill bit in wire gauge size 19 (0.1660 inches decimal equivalent), manufactured from M2 high speed steel with a bronze/purple coating. The bit features a 135-degree split point with web thinning for reduced thrust and improved self-centering on entry. With an overall length of 3.25 inches and a 2.125-inch flute length, this is a standard jobber geometry suited for general-purpose drilling in production and maintenance environments. It is sold individually and typically ordered in multiples of 12. Machinists, maintenance technicians, and fabricators install this bit in drill presses, hand drills, and CNC drilling operations.

This drill bit is designed for drilling steel, stainless steel, cast iron, superalloys, and titanium — material classification codes P, M, K, and S. The Series HX18 designation places it within the HX10-HX15-HX18 family of general-purpose jobber bits. The right-hand spiral flutes and straight cylindrical shank make it compatible with standard three-jaw drill chucks. No coolant-through capability is present, so external coolant or cutting fluid is recommended when drilling harder alloys or at sustained feed rates.

Key Features

• Wire size 19 (0.1660 inches) with matching straight cylindrical shank diameter for true concentricity
• M2 high speed steel construction for heat resistance during prolonged drilling cycles
• Bronze coating reduces friction and extends tool life in ferrous materials
• 135-degree split point with web thinning lowers entry thrust and minimizes walking on flat surfaces
• Regular spiral, two-flute design provides efficient chip evacuation in through-hole and blind-hole applications
• ANSI-standard geometry ensures dimensional interchangeability with standard drill chucks and holders

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard three-jaw chucks on drill presses, hand drills, and CNC drilling equipment where a 0.1660-inch straight cylindrical shank is accepted. Part of the PRECISION TWIST DRILL HX10-HX15-HX18 series.

Installation Notes

This bit is installed by a machinist or maintenance technician into a standard drill chuck; ensure the chuck is fully tightened and the shank is fully seated before operating. Power down or de-energize the drill press or machine tool before changing bits. Apply cutting fluid or external coolant when drilling stainless steel, cast iron, or titanium to manage heat buildup. Do not exceed the recommended feed rate for the workpiece material, as M2 HSS bits can overheat and lose temper if run dry at high speeds in hard alloys.