Hertel 71206049 Jobber Length Drill Bit Letter M Hss

Product Description

The HERTEL 71206049 is a jobber-length drill bit sized to Letter M (0.2950 inches decimal), manufactured from high speed steel with an oxide coating for added lubricity and surface hardness. It features a 118-degree standard point angle, a two-flute spiral configuration, and a straight-cylindrical shank. The overall length is 4-3/8 inches, with a flute length of 3-1/16 inches. The web is thinned with a tapered web configuration, which reduces thrust and helps center the bit at the start of a cut. This bit is intended for general-purpose drilling in metal, wood, and plastics and is used by machinists, maintenance technicians, pipefitters, and general trade professionals.

Letter M drill bits fall within the 0.2500 to 0.3000 inch size range and are commonly used when a specific decimal diameter between standard fractional sizes is required. The 0.2950-inch diameter makes this bit a practical choice for tapping operations, clearance holes, and precision layout work where fractional sizes do not meet tolerance requirements. Right-hand cut suits standard drill press, hand drill, and mill operations. Coolant-through capability is not included, making this suited for conventional dry or externally lubricated drilling setups.

Key Features

• Letter M size at 0.2950 inches decimal diameter for precise non-fractional hole requirements
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction with oxide finish for improved wear resistance and chip flow
• Two-flute regular spiral geometry supports efficient chip evacuation in most common materials
• Straight-cylindrical shank compatible with standard drill chucks and collets
• General-purpose grade suitable for metal, wood, and plastic drilling applications

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill chuck or collet that accepts a 0.2950-inch straight-cylindrical shank, including drill presses, hand drills, and milling machines.

Installation Notes

Secure the shank fully in the chuck and verify concentricity before drilling. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life and improve hole finish. Reduce feed pressure near breakthrough to prevent grab and workpiece damage. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.