Hertel 74130162 Cobalt Screw Machine Drill Bit 5/64 in

Product Description

The HERTEL 74130162 is a cobalt screw machine length drill bit designed for drilling in tough materials including stainless steel, high-temperature alloys, and hardened steels. With a 5/64 inch (0.0781 inch decimal) diameter and a 135-degree split point, this bit starts on contact without a center punch and reduces walking on curved or uneven surfaces. The overall length of 1-11/16 inches and flute length of 11/16 inches make it well-suited for confined-space drilling on screw machine work, CNC applications, and close-tolerance production setups. Right-hand cutting with a regular spiral flute ensures efficient chip evacuation. Machinists, toolmakers, and maintenance technicians working with hard metals reach for cobalt bits when high-speed steel is not enough.

This bit fits applications where short, rigid tooling improves accuracy and reduces deflection. Screw machine length bits are commonly used in turret lathes, screw machines, drill presses, and hand-held power tools when a stubby profile is required. The straight cylindrical shank seats securely in standard drill chucks and collet holders. The web-thinned, split point geometry suits production drilling in ferrous and non-ferrous metals, plastics, and composites where entry precision matters. The straw finish indicates a heat-treated cobalt substrate without an additional surface coating.

Key Features

• Cobalt (HSCO) tool material for superior heat resistance in hard and abrasive materials
• 135-degree split point reduces thrust and eliminates center-punch requirement
• Web-thinned with parallel web configuration for reduced cutting resistance
• Screw machine (stub) length of 1-11/16 inches overall for rigidity and reduced deflection
• Right-hand, regular spiral flute with 2 flutes for efficient chip removal
• Straight cylindrical shank compatible with standard drill chucks and collets

Compatibility

Designed as an OEM-style replacement or standard replacement bit for screw machine length drill bit applications in the 0.0000 to 0.1000 inch decimal size range. Fits any standard drill chuck or collet accepting a straight cylindrical shank in the 5/64 inch diameter class.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with rotary cutting tools. Secure the shank fully in the chuck or collet before operating. Ensure spindle speed and feed rate are appropriate for the workpiece material and bit diameter. Do not exceed the bit's rated capacity or apply side-loading forces, as this can cause breakage in small-diameter cobalt bits.