Hertel 74130774 Cobalt Drill Bit Size 25 135 Deg

Product Description

The HERTEL 74130774 is a screw machine length (stub-length) drill bit designed for high-production drilling in metals and hard materials. Built from cobalt high-speed steel (HSCO) with a 135-degree split point, it starts on contact without a center punch and cuts aggressively through stainless steel, cast iron, and other tough alloys. The bit measures 2-1/16 inches overall length with a 1-inch flute length, and carries a wire gauge size 25 decimal equivalent of 0.1495 inches. The web-thinned, parallel-web construction reduces thrust force and extends tool life in demanding production environments. A straight cylindrical shank seats securely in standard drill chucks and quick-change holders.

This bit is suited for machining, fabrication, and maintenance applications where a shorter, stiffer drill is preferred over jobber-length tooling. The stub-length body resists deflection in sheet metal drilling, light fixture work, and close-quarters metal fabrication. It is commonly used in drill presses, CNC mills, and hand-held drill motors by machinists, millwrights, and experienced trade professionals working in metal-intensive environments.

Key Features

• Cobalt HSS (HSCO) construction handles elevated cutting temperatures in stainless steel and hard alloys
• 135-degree split point starts on contact and reduces walking on curved or angled surfaces
• Web-thinned, parallel-web design lowers thrust requirements and reduces drill press fatigue
• Screw machine (stub) length provides greater rigidity and less deflection than jobber-length bits
• Right-hand spiral flute evacuates chips efficiently during through-hole drilling
• Straight cylindrical shank fits standard 3-jaw chucks and quick-change systems without adapters

Compatibility

Designed as an OEM-style replacement or production-grade addition for standard straight-shank drill chucks and quick-change holders accepting wire gauge size 25 (0.1495 inches diameter) tooling.

Installation Notes

Install in a properly rated drill chuck and tighten with a chuck key before operation. Secure the workpiece firmly before drilling to prevent rotation and bit damage. Use appropriate cutting fluid or coolant when drilling stainless steel or hardened alloys to extend tool life. Inspect the cutting edges before each use and remove from service if chipping or wear is evident.