Hertel 89322077 Drill Bit Letter N 118 Degree Hss

Product Description

The HERTEL 89322077 is a screw machine length drill bit sized to Letter N (0.3020 inches decimal equivalent), ground to a 118-degree split-point angle and manufactured from high-speed steel with a bright/uncoated finish. Screw machine length bits are shorter than jobber-length bits, which reduces deflection and improves rigidity in drill press, turret lathe, and screw machine applications. The right-hand cut and general-purpose grade make this bit a reliable choice for production drilling in steel, aluminum, brass, and similar materials. Overall length is 2.8125 inches with a flute length of 1.625 inches.

This drill bit is suited for general-purpose production environments where a compact, rigid tool is preferred over a standard jobber-length bit. Typical applications include drilling in CNC turret lathes, automatic screw machines, drill presses, and benchtop setups requiring consistent hole sizing in the 0.300 to 0.350 inch decimal range. It is sized for Letter N work where a close-tolerance hole is required before reaming or tapping operations. Machinists, tool-and-die workers, and maintenance technicians are the primary users of this type of bit.

Key Features

• Letter N size — 0.3020 inch decimal equivalent for consistent hole sizing
• 118-degree drill point angle suited for general-purpose drilling across common metals
• High-speed steel construction provides durability in production drilling cycles
• Bright/uncoated finish allows easy visual inspection for wear and damage
• Screw machine length body reduces deflection and increases rigidity versus jobber-length bits
• Right-hand cut compatible with standard drill press and machine tool spindles

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard drill chucks and collet systems accepting shanks in the Letter N size range (0.300 to 0.350 inch decimal inch range).

Installation Notes

Install and remove this bit with the machine fully powered down and the spindle at a complete stop. Secure the shank firmly in a drill chuck or collet to the manufacturer-recommended engagement depth before operation. Inspect the cutting edges and flutes for wear or damage before each use; a dull or chipped bit should be resharpened or replaced before drilling. Follow applicable shop safety standards and machine tool operating procedures when setting speeds and feeds for the workpiece material.