Hertel 84580653 Jobber Drill Bit Letter R 135 Deg Hss

Product Description

The HERTEL 84580653 is a high speed steel jobber-length drill bit sized to Letter R (0.3390 inches), designed for general-purpose holemaking in metal, wood, and composite materials. It features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The oxide coating provides basic corrosion resistance and helps reduce friction during cutting. At 4-3/4 inches overall length with a 3-7/16-inch flute length, this bit fits standard drill chucks and drill presses used in fabrication, maintenance, and mechanical contracting work. It is a heavy-duty grade bit appropriate for production or repetitive drilling applications.

This drill bit is suited for holemaking tasks in residential, commercial, and industrial settings. Typical applications include drilling clearance holes, pilot holes, and through-holes in ferrous and non-ferrous metals. The straight-cylindrical shank accepts standard three-jaw chucks on hand drills, drill presses, and CNC equipment. The regular spiral and tapered web configuration promote chip evacuation in moderate-depth holes. Machinists, pipefitters, electricians, and general maintenance technicians commonly use jobber-length bits in this size range.

Key Features

• Letter R sizing at 0.3390 inches decimal equivalent for consistent bore diameter
• 135-degree split point reduces thrust and eliminates center-punch requirement on most workpieces
• High speed steel construction with oxide coating for corrosion resistance and reduced friction
• Web-thinned, tapered web design promotes efficient chip removal and reduces heat buildup
• Two-flute spiral configuration with regular helix for balanced chip evacuation
• Heavy-duty grade rated for repetitive production drilling use

Compatibility

Designed as a standard jobber-length drill bit with a straight-cylindrical shank; compatible with any three-jaw chuck or collet system accepting a 0.3390-inch shank diameter on hand drills, drill presses, and CNC spindles.

Installation Notes

Secure the shank fully in the chuck and confirm the bit runs true before beginning a cut. Disconnect power to any machine tool before changing or inspecting bits. Use cutting fluid appropriate for the workpiece material to extend bit life and maintain hole quality. Bits should be inspected for chipping or dulling after heavy use and replaced before bore diameter tolerance is affected.