Hertel 74132317 Cobalt Screw Machine Drill Bit Size 34

Product Description

The HERTEL 74132317 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metal fabrication, machining, and production environments. Built from cobalt steel with a TiAlN coating, it delivers superior heat resistance and extended tool life compared to standard HSS bits. The split point geometry at 135 degrees reduces walking and requires no center punch on most workpiece materials. At 1.875 inches overall length, the stub-length design provides added rigidity for minimizing deflection in short-hole drilling applications. This bit is typically installed and used by machinists, tool and die technicians, and maintenance professionals working on drill presses, CNC machines, or hand-held power drills.

This drill bit is suited for drilling ferrous metals, stainless steel, hardened alloys, and other difficult-to-machine materials where heat buildup shortens tool life. The screw machine length format is common in production drilling setups where rigidity and repeatability matter. The 0.1110-inch decimal diameter corresponds to wire gauge size 34, making it a standard selection for tapped hole preparation, dowel pin clearances, and precision through-holes in industrial and maintenance machining applications.

Key Features

• Cobalt steel construction for high heat resistance in tough alloy and stainless steel drilling
• TiAlN coating extends tool life and reduces friction during high-speed cutting
• 135-degree split point reduces thrust force and eliminates walking without center-punching
• Web-thinned parallel web configuration improves chip evacuation and cutting efficiency
• Screw machine (stub) length at 1.875 inches overall provides maximum rigidity and reduced deflection
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Right-hand spiral flute with regular helix for consistent chip removal

Compatibility

Designed as an OEM-style replacement or production-use drill bit for standard drill chucks and collet systems accepting a straight-cylindrical shank in the size 34 wire gauge diameter range (0.1110 inches).

Installation Notes

This drill bit is intended for use by machinists and metalworking professionals operating drill presses, milling machines, or CNC drilling equipment. Secure the straight-cylindrical shank firmly in a keyed or keyless chuck before operation, and verify runout is within acceptable tolerance for precision work. Coolant-through is not supported on this bit, so apply cutting fluid externally when drilling stainless or hardened alloys to manage heat. Inspect the cutting edges before each use and replace the bit if chipping or coating wear is evident to avoid workpiece damage.