Hertel 74130949 Cobalt Screw Machine Drill Bit Size 42

Product Description

The HERTEL 74130949 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including hardened steels, stainless steel, and heat-resistant alloys. Built to wire gauge size 42 with a decimal diameter of 0.0935 inches, this bit features a 135-degree split point that reduces walking and requires no center punch. The overall length of 1.75 inches makes it ideal for short-hole and close-clearance drilling applications. It is part of the HSCO135 series and suited for machinists, maintenance technicians, and metalworking professionals who need a reliable short-length bit for production or repair work.

This bit is a standard fit for screw machine operations, turret lathes, drill presses, and CNC machining centers where stub-length tooling is preferred for rigidity and reduced deflection. The right-hand cutting direction and regular spiral flute geometry make it compatible with conventional drilling setups. With a straight cylindrical shank and parallel web configuration, it seats securely in standard drill chucks and collets without modification. Applications include through-hole and blind-hole drilling in ferrous and non-ferrous metals encountered in general manufacturing, toolroom, and industrial maintenance environments.

Key Features

• Cobalt construction for heat resistance and extended tool life in hard materials
• 135-degree split point reduces thrust, minimizes walking, and eliminates need for center punching
• Web-thinned parallel web for reduced cutting resistance and improved chip evacuation
• Screw machine (stub) length at 1.75 inches OAL provides rigidity and reduced deflection
• Right-hand cut with 2-flute regular spiral geometry for standard drilling operations
• Straight cylindrical shank compatible with standard drill chucks and collets

Compatibility

Designed as an OEM-style replacement or standard tooling option for screw machine and short-length drilling applications requiring a wire gauge size 42 cobalt drill bit with a straight shank.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tool safety. Ensure the drill chuck or collet is properly tightened and rated for the shank diameter before operation. Always power down and lock out the machine before changing tooling in accordance with applicable OSHA lockout/tagout procedures. Do not exceed the recommended speed and feed rates for the workpiece material and bit diameter.