Hertel 16691420 Straight-flute Carbide Drill Bit 0.29 in

Product Description

The HERTEL 16691420 is a straight-flute carbide drill bit engineered for demanding metal-cutting applications in industrial and trade environments. Built from C2 carbide with a bright, uncoated finish, this bit delivers a 0.29 inch (Letter L) diameter with a 140-degree notched point and web-thinned geometry for improved penetration and reduced thrust. The 2-flute, right-hand cutting configuration provides clean entry and controlled chip evacuation. It is sized at 1.5625 inches of flute length and 2.75 inches overall, making it a compact, precision tool suited for production drilling and maintenance operations performed by machinists and tooling technicians.

This drill bit is designed for use on hard and exotic metals including stainless steel, chrome alloy, heat-treated alloy, nickel alloy, titanium alloy, and general-purpose steel. Its carbide construction and notched point geometry make it well suited for applications where high-speed steel bits lose edge retention or deflect under load. Typical use cases include fabrication shops, aerospace maintenance, and industrial service work where material hardness and precision tolerancing are critical factors.

Key Features

• C2 carbide tool material for extended edge life in hard and exotic alloys
• 140-degree notched point with web-thinned geometry reduces entry thrust and improves centering
• Bright uncoated finish — no coating layer to spall or delaminate during high-speed applications
• Right-hand, 2-flute straight configuration for controlled chip flow in short-flute applications
• Diameter tolerance of +0.0000 to -0.0005 inches for close-tolerance hole sizing
• Series 470 design — no coolant-through, suited for external coolant or dry cutting setups

Compatibility

Designed as an OEM-style replacement or direct-application straight-flute drill bit for use in standard drill chucks and CNC toolholders accepting a 0.29 inch shank diameter.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide cutting tool handling. Carbide is brittle — avoid side loading, interrupted cuts without appropriate feed reduction, or dropping the bit on hard surfaces. Secure the bit fully in the chuck or collet before operation and confirm runout is within tolerance for the application. Follow applicable OSHA machine guarding and PPE requirements when operating drilling equipment.