Hertel 84580661 Jobber Drill Bit Letter S 0.3480 in

Product Description

The HERTEL 84580661 is a letter-size S jobber-length drill bit designed for general-purpose holemaking in metal and other industrial materials. Built from high speed steel with an oxide coating, it features a 135-degree split point that reduces walking and cutting pressure at contact. The web-thinned, tapered web construction improves chip evacuation and lowers thrust requirements. With a 0.3480-inch cutting diameter, a 4-7/8-inch overall length, and a 3-1/2-inch spiral flute, this bit suits a wide range of production and maintenance drilling tasks. It is rated heavy duty and conforms to NAS specification. Right-hand cutting with a regular spiral and two flutes.

This drill bit is intended for use in manual drill presses, CNC machining centers, and handheld power drills where letter-size hole tolerances are required. The straight-cylindrical shank fits standard three-jaw chucks without adapters. Typical applications include through-hole drilling in steel, aluminum, and cast iron for fabrication, maintenance, and repair work. No coolant-through capability is present, so external coolant or cutting fluid is recommended when drilling harder materials at sustained feed rates.

Key Features

• Letter S (0.3480 inch) cutting diameter for precise hole sizing
• 135-degree split point reduces drill walk and entry pressure
• Web-thinned tapered web lowers thrust and improves chip flow
• High speed steel construction with oxide coating for wear resistance
• Right-hand spiral flute, 2-flute design for efficient chip evacuation
• Heavy duty grade conforming to NAS specification

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for any standard drill press, machining center, or power drill equipped with a chuck accepting a 0.3480-inch straight-cylindrical shank.

Installation Notes

Installation is performed by machinists, maintenance technicians, and trade professionals using standard three-jaw drill chucks. Secure the shank fully in the chuck and verify concentricity before operation. Disconnect power or engage the e-stop on the machine before changing bits. Apply appropriate cutting fluid when drilling ferrous metals to extend tool life and maintain hole quality.