Hertel 74131400 Screw Machine Drill Bit 7/64 in Cobalt

Product Description

The HERTEL 74131400 is a screw machine length drill bit designed for high-performance drilling in hard and abrasion-resistant materials. Built from cobalt steel and finished with a TiAlN coating, this bit handles elevated cutting temperatures better than standard high-speed steel tooling. The 135-degree split point reduces walking and lowers thrust requirements at entry, making it well-suited for production drilling without a center punch. At 1-13/16 inches overall length with a 13/16-inch flute, the stub-length geometry increases rigidity and reduces deflection in short-reach applications. The straight cylindrical shank seats in standard drill chucks without additional adapters.

This bit is used in machine shop, fabrication, and maintenance applications where hole accuracy and tool life in harder workpieces are priorities. Screw machine length bits are a common choice for drill press, CNC, and turret lathe setups where a shorter, stiffer tool outperforms jobber-length alternatives. Machinists and toolroom technicians working with stainless steel, alloy steel, cast iron, and similar materials select cobalt TiAlN tooling for its extended wear resistance under continuous cutting loads.

Key Features

• Cobalt tool material resists heat buildup during high-speed or dry drilling operations
• TiAlN coating extends tool life in abrasive and hard workpiece materials
• 135-degree split point reduces entry walking and lowers required feed pressure
• Stub screw machine length increases rigidity and minimizes deflection
• Web-thinned parallel web configuration maintains cutting efficiency as the bit wears
• Right-hand spiral flute clears chips efficiently in through-hole and blind-hole applications

Compatibility

Designed as a direct-fit replacement for 7/64-inch screw machine length drill bits used in standard drill chucks accepting straight cylindrical shanks across drill press, CNC, and manual lathe turret applications.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and the spindle at rest. Secure the straight cylindrical shank fully within the chuck jaws and tighten evenly to prevent runout. Verify chuck capacity accommodates a 7/64-inch shank before seating the bit. Use appropriate cutting fluid or cooling strategy for the workpiece material to maximize coating life.