Hertel 66694225 Jobber Drill No 23 Hss Tin 135 Deg

Product Description

The HERTEL 66694225 is a high speed steel jobber-length drill bit with a titanium nitride (TiN) coating, designed for heavy-duty holemaking in metal, wood, and composite materials. The 135-degree split point reduces walking at contact and requires less thrust than a standard 118-degree tip. At 3.125 inches overall length with a 2-inch flute, this bit handles the depth demands of typical jobber applications. The straight-cylindrical shank seats securely in standard 3-jaw chucks. This is a professional-grade drill bit suited for machinists, maintenance technicians, and trade professionals working with hand drills, drill presses, and CNC equipment.

The 66694225 is sized to wire gauge No. 23, which corresponds to a decimal diameter of 0.1540 inches. This size is commonly used in precision holemaking tasks such as tap-size drilling, pilot hole work, and sheet metal fabrication across HVAC, electrical, plumbing, and mechanical service trades. The two-flute spiral design with a tapered, web-thinned construction provides efficient chip evacuation and reduced heat buildup during continuous use.

Key Features

• 135-degree split point reduces drill walk and lowers required thrust force
• TiN coating extends tool life and reduces friction during cutting
• Web-thinned, tapered web construction improves penetration efficiency
• Regular spiral flute geometry supports consistent chip clearing
• Straight-cylindrical shank fits standard drill chucks without adapters
• NAS specification designation confirms heavy-duty grade construction

Compatibility

Designed as a jobber-length drill bit fitting standard 3-jaw drill chucks that accept a 0.1540-inch straight shank, compatible with hand drills, drill presses, and CNC spindles across general holemaking applications.

Installation Notes

Install and remove drill bits only when the drill or drill press is fully powered down and the chuck is stationary. Secure the shank fully in the chuck jaws before operation to prevent slippage or runout. Use appropriate cutting fluid or lubrication when drilling ferrous metals to extend bit life. Inspect the cutting edges and TiN coating before each use and replace the bit if chipping or excessive wear is present.