Hertel 79891693 Solid Carbide Jobber Drill Bit 0.033in

Product Description

The HERTEL 79891693 is a solid carbide jobber-length drill bit designed for precision drilling in aluminum and other non-ferrous materials. Ground to a 118-degree standard point angle with web thinning for improved center penetration, this bit cuts a 0.0330-inch diameter hole corresponding to wire gauge size 66. The straight cylindrical shank measures 0.4844 inches in diameter, and the overall length is 1.125 inches. The bright, uncoated finish keeps the carbide substrate exposed for applications where coating buildup or chemical interaction with workpiece material is a concern. Machinists and toolroom technicians working with small-diameter precision holes in aluminum, copper, brass, and similar materials will find this an appropriate tool for the application.

This drill bit is suited for light-duty machining operations on aluminum, non-ferrous alloys, and soft materials where tight-tolerance holes are required. At 0.0330 inches in diameter, it is commonly used in instrument-grade work, electronics manufacturing, and precision fabrication. The regular spiral flute geometry promotes chip evacuation in short-depth holes typical of jobber-length operations. Coolant-through capability is not available on this bit, so external coolant or dry cutting practices should be applied as appropriate for the workpiece material and machine setup.

Key Features

• Solid carbide construction in material grade C2 for rigidity and wear resistance in non-ferrous drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust and improved hole entry
• Wire gauge size 66, cutting diameter 0.0330 inches with tolerance of -0.0005 to 0.0000 inches
• Regular right-hand spiral flute with 0.375-inch flute length for efficient chip removal in shallow holes
• Bright, uncoated finish suitable for aluminum and non-ferrous workpiece materials
• Straight cylindrical shank for standard collet, chuck, or drill press mounting

Compatibility

Designed as a general-purpose jobber drill for use in CNC machining centers, drill presses, and hand-held drilling equipment configured to accept a straight cylindrical shank. Primary workpiece material compatibility is aluminum and non-ferrous metals per manufacturer specification.

Installation Notes

Installation of small-diameter carbide drill bits should be performed by a qualified machinist or toolroom technician. Secure the straight shank fully and concentrically in the chuck or collet to prevent runout, which can snap carbide bits at small diameters. Power down or lock out the spindle before changing tooling. Avoid side loading or interrupted cuts, as solid carbide is brittle and susceptible to breakage under lateral stress.