Hertel 74130824 Cobalt Screw Machine Drill Bit Size 30

Product Description

The HERTEL 74130824 is a cobalt screw machine length drill bit built for high-speed drilling in tough materials including alloy steels, stainless steel, and hard metals. The bit features a 135-degree split point that reduces walking and allows immediate cutting engagement without center-punching. At 1-15/16 inches overall length with a 15/16-inch flute, the screw machine profile delivers maximum rigidity in short-reach applications. The straight cylindrical shank fits standard drill chucks. Right-hand cutting with a regular spiral flute, web-thinned construction reduces thrust and improves chip evacuation. A straw finish is present from the cobalt heat treatment process. Sized at 0.1285 inches decimal equivalent, this is a wire gauge size 30 drill.

This bit is suited for metalworking environments including machine shops, maintenance facilities, and fabrication operations. Screw machine length bits are the preferred choice when drilling on milling machines, drill presses, or CNC equipment where shorter flute length improves rigidity and hole accuracy. The cobalt construction handles work-hardening materials that would wear out standard high-speed steel tooling. Typical users include machinists, maintenance mechanics, and industrial trade professionals who drill repetitively into ferrous metals and hard alloys.

Key Features

• Cobalt construction for extended tool life in hard and abrasive metals
• 135-degree split point reduces thrust and eliminates walking on entry
• Web-thinned parallel web lowers cutting force and improves chip flow
• Screw machine length at 1-15/16 inches overall for maximum rigidity
• Right-hand regular spiral flute with straight cylindrical shank
• No coolant-through design - suited for conventional flood or dry drilling

Compatibility

Designed as an OEM-style replacement or standard tooling selection for any drill press, milling machine, or hand drill equipped with a chuck accepting a straight cylindrical shank in the wire gauge size 30 range (0.1285 inches decimal).

Installation Notes

Installed by machinists and maintenance mechanics in machine shop or field maintenance settings. Secure the straight shank fully into a drill chuck and verify runout before drilling. Use appropriate cutting fluid or coolant for the workpiece material to maximize tool life. Inspect the split point for chipping before each use and replace when cutting edge integrity is compromised.