Hertel 79891941 Solid Carbide Jobber Drill Bit No. 43

Product Description

The HERTEL 79891941 is a solid carbide jobber-length drill bit sized to wire gauge No. 43, with a decimal diameter of 0.0890 inches. It features a 118-degree standard point angle with web thinning for improved chisel-edge penetration and reduced thrust. The bright finish leaves the carbide substrate exposed for good heat visibility during use. At 2 inches overall length with a 1-inch flute length, this bit is suited for short-reach drilling in hard or abrasive materials where high-speed steel would wear prematurely. Machinists, tool-and-die techs, and precision fabricators are the primary users.

This bit is used in CNC machining centers, drill presses, and handheld precision drilling applications requiring tight-tolerance hole sizing in the 0.0500 to 0.1000 inch diameter range. Common applications include pilot holes, through-holes in hardened steel, stainless, cast iron, nonferrous alloys, and composite materials. The straight-cylindrical shank fits standard collets and keyless chucks without modification. The regular spiral flute geometry handles chip evacuation in both through-hole and blind-hole work.

Key Features

• Solid carbide construction for superior wear resistance in hard and abrasive materials
• 118-degree standard point with web thinning reduces entry thrust and improves self-centering
• Bright finish coating maintains tight dimensional tolerance from -0.0005 to 0.0000 inches on diameter
• Regular spiral flute with tapered web configuration supports chip evacuation in both blind and through-hole drilling
• Straight-cylindrical shank at 0.0890 inches diameter fits standard collet systems
• C2 material grade carbide rated for high-performance cutting duty

Compatibility

Designed as a direct-fit replacement or upgrade for wire-size No. 43 jobber-length drill bits in applications requiring solid carbide performance within the 0.0500 to 0.1000 inch drill size range.

Installation Notes

A licensed machinist or trained fabricator should install and operate this bit using appropriate machine speeds and feeds for solid carbide tooling. Secure the straight-cylindrical shank fully in the collet or chuck before operation to prevent runout. Do not use in handheld rotary tools not rated for carbide tooling. Inspect for chipping or cracking before each use, as solid carbide is brittle and can fracture if subjected to lateral loading or improper feed rates.