Hertel 74130865 Cobalt Screw Machine Drill Bit Size 34

Product Description

The HERTEL 74130865 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including alloy steels, stainless steel, and heat-resistant metals. Built to the HSCO135 series specification, it features a 135-degree split point that reduces walking on entry and allows drilling to start without a center punch in most applications. At 1-7/8 inches overall length, this stub-length bit delivers added rigidity and reduced deflection compared to jobber-length equivalents. The right-hand cutting direction and two-flute regular spiral design produce consistent chip evacuation. This bit is sold individually and carries a minimum order quantity of 12 units.

This bit is suited for production drilling and repair work in metal fabrication, machine shops, and general industrial maintenance. Its short overall length and stiff geometry make it a common choice for drill press work and CNC short-run operations where hole location accuracy matters. The wire gauge No. 34 size (0.1110 inches decimal) falls within the 0.1000 to 0.1500 inch diameter range, making it appropriate for small-diameter through-holes and pilot holes in ferrous and non-ferrous metals. A licensed machinist, tool and die tech, or industrial maintenance mechanic would typically select this bit for precision metal drilling applications.

Key Features

• Cobalt construction for heat resistance and extended tool life in hard metals
• 135-degree split point reduces thrust force and eliminates center-punch requirement on most surfaces
• Web-thinned, parallel web configuration improves chip clearance and reduces cutting resistance
• Screw machine (stub) length at 1-7/8 inches OAL provides rigidity and minimizes deflection
• Right-hand cutting with two-flute regular spiral for predictable chip evacuation
• Straw finish (heat-treated surface) typical of cobalt HSS tooling

Compatibility

Designed as an OEM-style replacement or production-use drill bit for applications requiring a No. 34 wire gauge diameter (0.1110 inches) in screw machine length cobalt construction.

Installation Notes

Installation of this bit requires a drill press, CNC machine, or hand drill with a compatible straight-shank chuck rated for the 0.1110-inch shank diameter. Ensure the workpiece is firmly secured before drilling and use appropriate cutting fluid for ferrous metals to preserve tool life. Follow applicable shop safety standards and machine guarding requirements during operation. Inspect the cutting edges for wear before each use, as cobalt bits can chip if run at incorrect speeds or feeds for the material.