Hertel 66694217 No. 22 Jobber Drill Bit 135 Deg Tin Hss

Product Description

The HERTEL 66694217 is a No. 22 wire-size jobber-length drill bit designed for precision holemaking in metal, wood, and composite materials. Ground from high speed steel (HSS) with a titanium nitride (TiN) coating, this bit delivers extended tool life and reduced friction compared to uncoated HSS. The 135-degree split point is web-thinned, which minimizes walking on entry and reduces the thrust required to start a cut. At 3.125 inches overall length with a 2-inch flute, it fits standard drill chucks and drill presses used by machinists, pipefitters, electricians, and general maintenance trades.

This jobber drill is suited for production and maintenance drilling operations where a No. 22 wire-size hole is required. Common applications include pilot holes for tapping, clearance holes for fasteners, and layout drilling in sheet metal and structural steel. The straight-cylindrical shank seats securely in 3-jaw chucks and keyed drill press chucks without slippage. The NAS specification designation indicates this bit meets defined dimensional and performance standards for heavy-duty industrial use.

Key Features

• TiN coating extends tool life and reduces heat buildup during drilling
• 135-degree split point with web thinning reduces entry thrust and prevents bit walking
• High speed steel construction handles a broad range of ferrous and non-ferrous materials
• Regular spiral flute with tapered web promotes efficient chip evacuation
• Straight-cylindrical shank fits standard 3-jaw and keyed chucks without modification
• NAS specification designation confirms heavy-duty dimensional compliance

Compatibility

Designed as an OEM-style replacement or direct-fit jobber drill for use in standard drill presses, hand drills, and CNC drilling applications requiring a No. 22 wire-size (0.1570 inch) straight-shank bit.

Installation Notes

Installation is performed by machinists, electricians, pipefitters, or maintenance technicians using standard drill press or hand drill equipment. Secure the straight-cylindrical shank fully into the chuck jaws and tighten with a chuck key before operation. Always use appropriate cutting fluid or lubricant when drilling ferrous metals to preserve coating life and edge geometry. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.