Hertel 79892618 Solid Carbide Jobber Drill Bit Letter L

Product Description

The HERTEL 79892618 is a solid carbide jobber-length drill bit sized to letter L (0.2900 inches), designed for high-performance drilling in demanding production and maintenance environments. Built from C2-grade solid carbide with a bright finish, it delivers the hardness and wear resistance needed for drilling ferrous and non-ferrous metals, plastics, and composite materials. The standard 118-degree point angle and web-thinned, tapered web geometry reduce thrust and improve centering at entry. At 3.5 inches overall length with a 2.125-inch spiral flute, it fits standard jobber-length drill chucks and fixtures. Licensed machinists, tool and die technicians, and maintenance mechanics are the primary users.

This drill bit is suited for general-purpose and high-production drilling operations in machine shops, MRO facilities, and industrial maintenance settings. The straight-cylindrical shank with a 0.2900-inch diameter seats securely in standard three-jaw chucks and collet holders. The regular spiral flute promotes efficient chip evacuation in through-hole and blind-hole applications. It is appropriate for use on CNC machining centers, drill presses, and manual lathes where letter-size carbide tooling is specified.

Key Features

• Solid carbide construction, C2 material grade, for high hardness and extended tool life
• Letter L size — 0.2900 inches diameter — with tight tolerance of -0.0005 to 0.0000 inches
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Bright finish coating preserves sharp cutting edges without added coating buildup
• Regular spiral, 2-flute design promotes clean chip evacuation in a wide range of materials
• Straight-cylindrical shank fits standard chucks and collet systems without modification

Compatibility

Designed as a jobber-length replacement or production drill bit for applications requiring letter L sizing in standard straight-shank tool holders and three-jaw drill chucks.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide tooling requirements. Secure the shank fully in the chuck or collet before operation and confirm runout is within acceptable limits, as carbide is brittle and sensitive to side loading. Power down and de-energize the machine before changing tooling. Avoid impact or dropping the bit, as solid carbide will chip or fracture under shock loads.