Hertel 74131442 Screw Machine Drill Bit 11/64 in Cobalt

Product Description

The HERTEL 74131442 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metal fabrication, machining, and maintenance applications. Built from cobalt tool steel with a TiAlN coating, it handles tough materials including stainless steel, hardened alloys, and high-temperature metals. The bit measures 11/64 inches (0.1719 inches decimal) in diameter with a 2-1/8 inches overall length. The 135-degree split point reduces walking on contact, enabling accurate starts without a center punch on flat or curved surfaces. A web-thinned, parallel web configuration reduces thrust and improves chip clearance during drilling.

This bit is suited for screw machine operations, drill press work, and handheld drilling in production and shop environments. The shorter screw machine length body provides added rigidity compared to jobber-length bits, making it a preferred choice when drilling hard materials in tight clearances or fixture setups. Machinists, tool-and-die workers, and maintenance technicians commonly use this size for tapping preparation, clearance holes, and precision metalwork across light manufacturing and industrial repair settings.

Key Features

• Cobalt tool steel construction resists heat buildup during high-speed drilling in ferrous and hard alloy materials
• TiAlN coating extends tool life by reducing friction and improving wear resistance at elevated temperatures
• 135-degree split point promotes accurate hole starts and reduces required thrust
• Web-thinned parallel web lowers cutting resistance and improves chip evacuation
• Screw machine length body provides greater rigidity than standard jobber-length drill bits
• Straight cylindrical shank fits standard drill chucks and collets without adapters

Compatibility

Designed as a screw machine length cobalt drill bit for use in standard drill presses, CNC turret machines, and handheld drills accepting a straight cylindrical shank. Fits drill bit size range 0.1500 to 0.2000 inches decimal.

Installation Notes

Install this bit into a drill chuck or collet rated for straight cylindrical shanks and confirm secure seating before operation. Power down all equipment before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines for speeds and feeds when drilling hard or abrasive materials. Do not exceed the rated cutting speed for cobalt tooling in the material being drilled.