Hertel H95006121 No. 22 Jobber Drill Bit 137 Deg Hss

Product Description

The HERTEL H95006121 is a No. 22 wire-size high-speed steel jobber drill bit designed for production and maintenance drilling in steel and cast iron. The bit measures 0.1570 inches in diameter with an overall length of 3.125 inches and a flute length of 1.625 inches. It features a 137-degree split-point tip that self-centers on entry and reduces the thrust required to start a hole, making it well suited to hand-held and machine drilling in harder ferrous materials. A black oxide and gold finish provides mild lubricity and surface protection during cutting operations.

This jobber-length drill bit is used in general metalworking, maintenance, and fabrication environments where No. 22 wire-gauge holes are required in steel or cast iron workpieces. The regular spiral flute geometry promotes chip evacuation in these materials without the aggressive helix angles used for softer metals. It is appropriate for drill press, CNC, or handheld power-tool use. The ANSI-specification construction makes it a compatible replacement in any setup requiring a standard jobber-length No. 22 bit.

Key Features

• 137-degree split point self-centers on contact and reduces walking on hard surfaces
• High-speed steel construction rated for heavy-duty drilling in steel and cast iron
• Black oxide and gold (oxide plus TiN-style) finish reduces friction and extends service life
• Regular spiral flute geometry promotes clean chip evacuation in ferrous materials
• Right-hand cutting direction, standard for conventional drill press and CNC use
• ANSI-specification jobber series, 0.1570-inch diameter for consistent hole sizing

Compatibility

Designed as a standard ANSI jobber-length drill bit in No. 22 wire size (0.1570 inches), suitable for use in any drill chuck or collet accepting a 0.1570-inch shank. Primary workpiece materials are steel and cast iron.

Installation Notes

This bit is installed and replaced by machinists, tool-and-die workers, and maintenance mechanics. Secure the shank fully in the chuck before operation and verify that the workpiece is clamped or fixtured. Coolant-through is not supported on this bit; use a compatible cutting fluid applied externally when drilling steel to manage heat and extend tool life. Inspect the split point for chipping or wear before each use and replace the bit if the cutting edges show signs of dullness to prevent work hardening of the material or bit breakage.