Hertel 74130899 Cobalt Screw Machine Drill Bit Size 37

Product Description

The HERTEL 74130899 is a cobalt screw machine length drill bit designed for high-speed, precision drilling in tough materials. Built to wire gauge Size 37, it drills a 0.1040-inch diameter hole with a 135-degree split point that reduces walking and cuts through hardened steels, stainless, and other difficult metals with less thrust than a standard point. The short overall length of 1-13/16 inches provides rigidity in applications where chatter and deflection are concerns. The straw finish is a byproduct of the cobalt manufacturing process and provides a visual indicator of heat treatment quality. Licensed HVAC, plumbing, and mechanical contractors as well as industrial machinists use this bit in drill presses, CNC machines, and hand-held power drills.

This bit is suited for production drilling and repair work where small-diameter, close-tolerance holes are required. Typical applications include drilling pilot holes in sheet metal, structural steel, and stainless assemblies. The screw machine length is the preferred choice when working in confined spaces or chuck clearance is limited. The straight cylindrical shank fits standard drill chucks without adapters. This bit is sold individually but must be ordered in multiples of 12.

Key Features

• Cobalt construction for improved heat resistance and extended tool life in hard and abrasive materials
• 135-degree split point reduces drill walking and lowers required feed pressure
• Web-thinned parallel web design for improved chip evacuation and reduced torque
• Screw machine length provides superior rigidity compared to jobber-length bits
• Right-hand cutting with regular spiral flute for standard drill press and hand drill use
• Straight cylindrical shank fits directly into standard three-jaw drill chucks

Compatibility

Designed as a direct-fit replacement or production-use bit for any drill press, CNC drilling center, or hand-held power drill equipped with a standard straight-shank chuck capable of holding a 0.1040-inch diameter shank.

Installation Notes

This bit is installed by a machinist, maintenance technician, or trade professional with a drill press or hand-held power drill. Always secure the workpiece before drilling and confirm the chuck is fully tightened before operation. Use appropriate cutting fluid or coolant when drilling hardened or stainless steel to extend bit life and reduce heat buildup. Inspect the split point for damage before each use and replace if chipping or wear is visible.