Hertel 84579309 Jobber Drill Bit 29/64 in Hss 135 Deg

Product Description

The HERTEL 84579309 is a high speed steel jobber-length drill bit designed for general-purpose holemaking in metal, wood, and similar materials. It features a 135-degree split point that reduces walking on contact and allows drilling to start without a center punch in most applications. The oxide coating provides modest lubricity and corrosion resistance during use. At 5-5/8 inches overall length with a 4-3/16-inch flute length, this bit fits standard drill chucks and magnetic drill press setups commonly used by trade professionals across mechanical, plumbing, and electrical work.

This jobber drill is suited for production and maintenance drilling tasks in residential and commercial settings. The straight cylindrical shank accepts standard three-jaw chucks on hand drills, drill presses, and mill spindles. The 2-flute spiral configuration with a regular spiral type provides efficient chip evacuation in through-hole applications. Web thinning and a tapered web configuration reduce thrust requirements, making it practical for hand-held drilling in tight spaces common in mechanical and electrical rough-in work.

Key Features

• 135-degree split point reduces bit walking and lowers entry thrust
• High speed steel construction rated for heavy-duty drilling applications
• Oxide finish provides surface lubricity and basic corrosion protection
• Web-thinned tapered web reduces drill thrust and heat buildup
• Right-hand cut with 2 regular spiral flutes for efficient chip clearance
• NAS specification designation for dimensional and performance consistency

Compatibility

Designed as a standard jobber-length drill bit for use in any straight-shank drill chuck; fits hand drills, drill presses, and milling machines accepting a 29/64-inch straight cylindrical shank.

Installation Notes

A licensed machinist, electrician, plumber, or mechanical technician can install and operate this drill bit using standard shop or field procedures. Secure the shank fully in the chuck and verify tightness before operation. Power down the drill completely before changing bits. Do not exceed the rated speed range for the material being drilled, and use cutting fluid when drilling steel to extend bit life and reduce heat.