Hertel 84579176 Jobber Drill Bit Letter E Hss Oxide

Product Description

The HERTEL 84579176 is a letter E jobber-length drill bit designed for general-purpose holemaking in metal and other hard materials. It measures 0.2500 inches (1/4 inch) in diameter with a 4-inch overall length and a 2-3/4-inch flute length. The 135-degree split point reduces walking at the start of a hole and lowers the thrust force required during drilling. The bit is manufactured from high speed steel with an oxide coating that provides basic surface protection and reduced friction during cutting. The straight cylindrical shank accepts standard drill chucks without modification, and the regular spiral flute pattern promotes chip evacuation in typical drilling applications.

This bit is suited for production and maintenance drilling tasks where a heavy-duty grade, right-hand cutting, two-flute jobber drill is the standard tool of choice. The web-thinned, tapered web configuration reduces cutting resistance and is appropriate for hand-held drills, drill presses, and CNC applications requiring a 1/4-inch hole. It is sold individually but requires a minimum order quantity of 12 units, making it well suited for shop stocking or tool crib replenishment.

Key Features

• 135-degree split point minimizes drill walking and reduces entry thrust
• High speed steel construction with oxide coating for surface protection
• Web-thinned tapered web for reduced cutting resistance
• Right-hand cutting, regular spiral flute for efficient chip removal
• Heavy-duty grade, NAS specification designation
• Straight cylindrical shank fits standard 1/4-inch drill chucks

Compatibility

Designed as a jobber-length replacement or stocking drill bit for any application requiring a standard 1/4-inch straight-shank drill in high speed steel with a 135-degree split point geometry.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance professionals familiar with rotating cutting tools. Confirm the drill chuck is securely tightened and the workpiece is properly clamped before operation. Inspect the cutting edges and flutes for wear or damage before each use and replace the bit if chipping or dulling is observed. Follow applicable shop safety standards and equipment manufacturer guidelines for speed and feed selection.