Hertel 74132267 Screw Machine Drill Bit Size 29 Cobalt

Product Description

The HERTEL 74132267 is a screw machine length drill bit engineered for high-performance drilling in metal and hard materials. Built from cobalt steel and finished with a TiAlN coating, it handles elevated heat and abrasion better than standard HSS tooling. The split point geometry at 135 degrees reduces walking at entry and lowers thrust force, making it well suited for production drilling and CNC applications. At 0.1360 inch diameter (wire size 29) with an overall length of 1-15/16 inches and a flute length of 15/16 inch, this bit is designed for rigid, close-clearance setups where stub-length rigidity is required. Right-hand cutting with a regular spiral flute ensures consistent chip evacuation.

This drill bit is used in machine shop, fabrication, and maintenance environments where Number 29 wire gauge holes are required in steel, stainless, cast iron, and other ferrous or hard alloy workpieces. The screw machine length format is common in turret lathes, drill presses, CNC machining centers, and gang drilling fixtures where minimal overhang improves accuracy and reduces deflection. It is a standard tool for machinists, tool-and-die technicians, and industrial maintenance professionals.

Key Features

• Cobalt steel construction provides heat and wear resistance beyond standard HSS bits
• TiAlN coating extends tool life in abrasive and high-temperature cutting conditions
• 135-degree split point reduces drill walk and lowers entry thrust force
• Screw machine (stub) length at 1-15/16 inches overall for maximum rigidity
• Web-thinned parallel web configuration improves chip flow and reduces torque
• Straight-cylindrical shank fits standard drill chucks without adaptation

Compatibility

Designed as an OEM-style replacement or direct-use tooling for any drill press, turret lathe, CNC machining center, or hand drill chuck accepting a straight-cylindrical shank in the Number 29 wire gauge size range.

Installation Notes

This bit is installed by machinists and tooling technicians into standard drill chucks or collet holders. Ensure the chuck or collet is clean and free of debris before seating the shank, and verify runout before production use. Coolant-through is not supported on this bit, so apply cutting fluid externally when drilling ferrous materials to extend tool life. Always operate within the recommended SFM range for cobalt tooling based on workpiece material.