Hertel 74132077 Screw Machine Drill Bit Size 9 Cobalt

Product Description

The HERTEL 74132077 is a screw machine length drill bit designed for high-production drilling in metal fabrication, machining, and maintenance applications. Built from cobalt tool steel with a titanium aluminum nitride (TiAlN) coating, this bit handles elevated heat and abrasion better than standard high-speed steel. It carries a 135-degree split point that starts on contact without a center punch, reducing walking on hard or interrupted surfaces. At 2.25 inches overall length, the stub-length format increases rigidity and reduces deflection in short-hole drilling operations. The 0.1960-inch diameter corresponds to a wire gauge size 9.

This bit suits close-tolerance drilling in steel, stainless, cast iron, and other ferrous materials where heat buildup shortens tool life. The TiAlN coating extends tool life in dry or near-dry cutting conditions common in production machining environments. The straight cylindrical shank fits standard drill chucks on CNC machining centers, drill presses, and portable power tools. Right-hand cut with a regular spiral flute, this is a direct-use replacement in most standard drill press or hand-drill setups requiring a size 9 wire gauge diameter.

Key Features

• Cobalt tool steel construction resists heat and wear in ferrous and hard-alloy drilling
• TiAlN coating extends tool life in dry and low-coolant cutting conditions
• 135-degree split point starts on contact, no center punch required
• Web-thinned, parallel-web design reduces thrust force and improves chip evacuation
• Stub screw machine length increases rigidity and reduces deflection
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a direct-fit replacement for wire gauge size 9 screw machine length drill bits used in standard drill chucks accepting a straight cylindrical shank.

Installation Notes

A licensed machinist or qualified technician should inspect the chuck and spindle for runout before installing a new bit. Secure the shank fully in the chuck and verify concentricity before beginning a cut. Use appropriate eye protection and machine guarding per applicable shop safety standards. Coolant-through is not supported on this bit; use external coolant or dry-cutting technique appropriate to the workpiece material.