Hertel 74131046 Cobalt Screw Machine Drill Bit Size 52

Product Description

The HERTEL 74131046 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including alloy steels, stainless steel, and hard cast iron. Built to Series HSCO135 specs, it features a 135-degree split point that reduces walking and allows self-centering on contact without a center punch. The web-thinned, parallel web construction lowers thrust requirements. At 0.0635 inches in diameter (wire gauge size 52) with an overall length of 1-11/16 inches and a flute length of 11/16 inches, this stub-length bit delivers maximum rigidity for precision work in screw machine and CNC drilling operations.

This bit is suited for production drilling in screw machines, turret lathes, and CNC machining centers where rigidity and repeatability matter. The shorter screw machine length body reduces deflection in high-feed applications. Right-hand cutting with a regular spiral flute pattern makes it appropriate for standard clockwise-spindle setups. It is typically installed by machinists and tool-room technicians working in metal fabrication, aerospace, and general manufacturing environments. Coolant-through capability is not supported on this bit.

Key Features

• Cobalt construction with straw finish for heat resistance in hard-material drilling
• 135-degree split point reduces drill walking and lowers entry thrust
• Web-thinned, parallel web design decreases cutting resistance
• Screw machine (stub) length body maximizes rigidity and reduces deflection
• Right-hand cut, regular spiral flute for standard spindle setups
• Straight cylindrical shank fits standard drill chucks and collets

Compatibility

Designed as an OEM-style screw machine length drill bit for use in standard drill chucks, collets, and turret tooling that accept a straight cylindrical shank in the 0.0635-inch diameter range.

Installation Notes

Installation and tool changes should be performed with the spindle fully stopped and the machine locked out per applicable OSHA and shop safety procedures. Secure the straight shank firmly in the chuck or collet to the full grip depth to prevent slippage under feed load. Inspect the cutting edges and split point for chips or wear before each use, especially when drilling hardened materials. Disposal of worn cobalt tooling should follow facility protocols for metal scrap and hazardous materials where applicable.