Hertel 74129263 Carbide Drill Bit 19/64 in 140 Degree

Product Description

The HERTEL 74129263 is a straight-flute carbide drill bit engineered for demanding metalworking applications. Built from C2 carbide with a bright, uncoated finish, it delivers hardness and edge retention when drilling through tough ferrous and non-ferrous metals. The bit measures 19/64 inches (0.2969 inches decimal) in diameter with a 140-degree notched point and web-thinned tip geometry that reduces thrust and improves chip clearance on entry. Cutting direction is right hand, and the two-flute design maintains rigidity in straight-hole applications. This is a tool specified and used by machinists, tool-and-die technicians, and maintenance professionals working in precision metal fabrication environments.

This drill bit is suited for applications requiring tight diameter tolerances, with a diameter tolerance of +0.0000 to -0.0005 inches. It is designed to cut chrome alloy, heat-treated alloy, nickel alloy, stainless steel, carbon steel, and titanium alloy workpieces. The notched point and web-thinned geometry make it particularly effective in production and job-shop settings where hard, work-hardening materials are encountered regularly. The shank diameter matches the cutting diameter at 19/64 inches (0.2969 inches decimal), allowing direct chuck mounting without a step-shank adapter.

Key Features

• C2 carbide tool material for hardness and wear resistance in ferrous and exotic metals
• 140-degree notched point with web-thinned tip reduces entry thrust and improves centering
• Tight diameter tolerance of +0.0000 to -0.0005 inches for precision hole sizing
• Bright, uncoated finish suitable for use with or without cutting fluid
• Two-flute straight design maintains bit rigidity in short, straight-hole drilling
• Right-hand cutting direction; compatible with standard drill presses, mills, and hand drills

Compatibility

Designed as a straight-flute carbide drill bit for use in standard drill chucks and milling machine spindles accepting a 19/64-inch round shank. Primary workpiece materials include chrome alloy, heat-treated alloy, nickel alloy, stainless steel, carbon steel, and titanium alloy.

Installation Notes

Secure the shank fully in the drill chuck or collet before operation and verify runout before drilling into finished workpieces. Carbide is brittle - avoid side-loading, interrupted cuts without appropriate feed rate reduction, or dropping the bit on hard surfaces. Use appropriate cutting fluid for the workpiece material to maximize tool life. Follow your shop's lockout/tagout procedures when mounting or removing bits from powered equipment.