Precision Twist Drill 5995819 No. 28 Hss Jobber Drill

Product Description

The PRECISION TWIST DRILL 5995819 is a Number 28 wire size (0.1405 inches decimal, 9/64 inches fractional) jobber-length drill bit ground to a 135-degree split-point angle and finished with a bronze coating over M2 high speed steel. At 2.875 inches overall length with a 1.75-inch spiral flute and a straight cylindrical shank, this bit is built for general-purpose production drilling in ferrous and hard materials. The 135-degree point reduces walking on entry and requires no center punch on most surfaces. Right-hand cut, regular spiral, two-flute configuration with a web-thinned, tapered web for improved chip evacuation and reduced thrust at depth.

This drill bit is suited for use in handheld drills, drill presses, and CNC or manual machine tool setups where a standard jobber-length bit is appropriate. Primary workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium, corresponding to material group codes P, M, K, and S. The 12xD flute-to-diameter ratio and 1.75-inch maximum drilling depth make this bit appropriate for through-hole and blind-hole applications in plate, structural, and machined stock up to that depth. It is commonly used by machinists, maintenance technicians, and fabricators in light industrial and field settings.

Key Features

• 135-degree split point reduces bit walking and lowers entry thrust on hard materials
• M2 high speed steel construction provides wear resistance in ferrous and exotic alloy drilling
• Bronze coating reduces friction and heat buildup at the cutting edge
• Web-thinned tapered web improves chip flow and reduces axial load at depth
• Straight cylindrical shank fits standard three-jaw drill chucks without adapters
• Meets ANSI standards; Series HX10-HX15-HX18

Compatibility

Designed as a general-purpose OEM-style jobber drill for use in standard drill chucks accepting a 0.1405-inch straight cylindrical shank. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium per material codes P, M, K, and S. Part of the HX10-HX15-HX18 series.

Installation Notes

Installation is performed by machinists, maintenance technicians, or fabricators using a standard drill press, hand drill, or machine tool with a three-jaw or keyless chuck. Secure the shank fully in the chuck before operation and verify runout is within acceptable limits for the application. Do not exceed the rated maximum drilling depth of 1.75 inches per pass without retracting to clear chips. Coolant-through is not supported on this bit; apply cutting fluid externally when drilling stainless steel, titanium, or superalloys to extend tool life.