Hertel 74132408 Screw Machine Drill Bit Size 43 Cobalt

Product Description

The HERTEL 74132408 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metal fabrication and machining applications. Built from cobalt high-speed steel with a TiAlN coating, this bit handles hardened steels, stainless, and other tough alloys where standard HSS bits fail. The 135-degree split point geometry reduces thrust, self-centers on contact, and minimizes walking without a center punch. Overall length is 1.75 inches, making it well-suited for CNC machines, drill presses, and turret lathes where rigidity and stub-length control are priorities. The straight cylindrical shank fits standard drill chucks without modification.

This bit is sized to wire gauge number 43, which corresponds to 0.0890 inch diameter. The screw machine length profile keeps the tool short and stiff, reducing deflection on precision holes. The regular spiral flute configuration with a 0.75-inch flute length clears chips effectively in short-hole drilling cycles. TiAlN coating adds heat resistance and extends tool life in dry or minimal-lubrication cutting environments. Machinists, tool and die makers, and maintenance technicians working on production runs or repair work in metal shops are the primary users of this bit.

Key Features

• Cobalt high-speed steel construction resists heat and wear in hard-material drilling
• TiAlN coating extends tool life in dry and high-speed cutting conditions
• 135-degree split point self-centers and reduces required thrust
• Screw machine length body maximizes rigidity and minimizes deflection
• Web-thinned parallel web reduces cutting resistance at the center
• Right-hand cutting spiral flute clears chips efficiently in short-hole applications

Compatibility

Designed as an OEM-style replacement screw machine length drill bit suitable for standard drill chucks and collet systems accepting a straight cylindrical shank in the 0.0890 inch diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or tool technicians familiar with drill press, CNC, or lathe tooling procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck. Verify chuck or collet capacity is appropriate for the straight shank diameter before securing. Follow applicable shop safety standards and machine manufacturer guidelines for feed rate and speed selection based on workpiece material.