Hertel 16691644 Straight-flute Drill Bit 60 Carbide

Product Description

The HERTEL 16691644 is a straight-flute carbide drill bit sized at wire gauge 60 (0.0400 inches diameter), built for precision drilling in tough ferrous and exotic alloy materials. The bit features a 140-degree notched point and a web-thinned geometry that reduces entry force and improves chip evacuation in difficult-to-machine workpiece materials. With an overall length of 1.5 inches and a flute length of 0.5 inches, this is a compact, short-geometry bit suited for close-quarters drilling operations. The bright uncoated finish and C2 carbide grade make it well matched to applications where lubricity coatings are not required. Machinists, tool and die professionals, and precision fabricators are the primary users of this bit.

This drill bit is designed for use in CNC machining centers, drill presses, and handheld precision drilling equipment where small-diameter hole production in hard materials is required. Primary workpiece materials include chrome alloy, heat-treated alloy, nickel alloy, stainless steel, steel, and titanium alloy. The right-hand cutting direction and two-flute straight configuration make it appropriate for both through-hole and blind-hole drilling within its maximum drilling depth of 1.5 inches. It is sold individually and is part of the Hertel Series 470 straight-flute drill line.

Key Features

• Wire gauge 60 diameter (0.0400 inches) with tight tolerance of +0.0000 to -0.0005 inches
• 140-degree notched point reduces thrust force on entry into hard alloys
• Web-thinned geometry improves chip flow and reduces heat buildup at the cutting edge
• C2 carbide grade provides hardness and wear resistance in ferrous and exotic alloy drilling
• Bright uncoated finish suited for use with cutting fluids in standard machining environments
• Two-flute straight configuration with right-hand cutting direction for standard drill operation

Compatibility

Designed as a Series 470 straight-flute carbide drill bit for use in precision machining applications involving chrome alloy, heat-treated alloy, nickel alloy, stainless steel, steel, and titanium alloy workpieces.

Installation Notes

This bit should be installed by qualified machinists or tooling professionals familiar with small-diameter carbide tooling. Secure the bit firmly in a compatible collet or drill chuck rated for the 0.0400-inch shank diameter before operation. Carbide tooling is brittle and can fracture if subjected to side loading or improper runout — verify chuck and spindle concentricity before use. Apply appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.