Hertel 85703478 Jobber Drill Bit Letter E 1/4 in 118 Hss

Product Description

The HERTEL 85703478 is a jobber-length drill bit sized at Letter E (0.2500 inches, or 1/4 inch) with a 118-degree standard point angle. It is manufactured from high speed steel with a bright, uncoated finish and is designed for general-purpose drilling in metal, wood, plastics, and composite materials. The 2-flute spiral flute geometry promotes chip evacuation, while the tapered web with web thinning reduces cutting resistance at the point. At 4 inches overall length with a 2-3/4 inch flute length, this bit fits standard drill chucks and magnetic-base drill presses used in fabrication, maintenance, and mechanical trade work.

This drill bit is suited for production and maintenance drilling in light manufacturing, HVAC, plumbing, and electrical trade applications where a reliable general-purpose jobber-length bit is required. The straight-cylindrical shank accepts standard 3-jaw chucks on both handheld drills and bench-mounted drill presses. Right-hand cutting direction is the industry standard for most drilling operations. The 118-degree point angle is appropriate for a wide range of common workpiece materials encountered on job sites and in shop environments.

Key Features

• Letter E size: 0.2500 inches (1/4 inch) diameter
• 118-degree standard point angle with web thinning for reduced entry force
• High speed steel construction for general-purpose durability
• Bright, uncoated finish — no additional coating to interfere with dimensional tolerances
• 2-flute regular spiral geometry for efficient chip clearance
• Straight-cylindrical shank fits standard 3-jaw drill chucks
• Right-hand cut, compatible with all standard drill drivers and press spindles

Compatibility

Designed as a general-purpose jobber-length drill bit fitting any standard 3-jaw chuck that accepts a 1/4-inch straight-cylindrical shank, including handheld drills, drill presses, and magnetic-base drills.

Installation Notes

Installed by machinists, maintenance technicians, and trade professionals using standard drill chucks. Secure the shank fully in the chuck before operation and verify chuck key is removed before powering the drill. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life. Inspect the cutting edges for wear or chipping before each use and replace if point geometry is compromised.