Hertel 89322192 Drill Bit Letter X 118 Degree Hss

Product Description

The HERTEL 89322192 is a screw machine length drill bit sized to Letter X (0.3970 inches decimal equivalent), designed for general-purpose drilling in metal, wood, and plastics. Built from high-speed steel with a bright uncoated finish, it features a standard 118-degree split-point geometry for self-centering starts and clean entry. The shortened screw machine length body provides added rigidity over jobber-length bits, making it well-suited for close-tolerance work in turret lathes, drill presses, and CNC screw machines. Machinists, tool-and-die technicians, and maintenance mechanics are the primary installers of this type of bit.

This drill bit is sized within the 0.3500 to 0.4000 inch decimal range, covering Letter X applications across a broad range of general-purpose production and maintenance drilling tasks. The overall length of 3-5/16 inches and a flute length of 1-15/16 inches make it a compact, stiff option for drilling in confined setups or short-travel machine spindles. Right-hand cutting direction is standard for conventional rotating spindles.

Key Features

• Letter X size, 0.3970 inch decimal equivalent for precise hole sizing
• 118-degree point angle for reliable centering on flat and curved surfaces
• High-speed steel construction provides heat resistance during continuous drilling cycles
• Bright uncoated finish allows easy visual inspection of cutting edge condition
• Screw machine length body increases rigidity and reduces deflection compared to jobber-length bits
• Right-hand cut compatible with standard rotating spindle equipment

Compatibility

Designed as a general-purpose screw machine length drill bit suitable for use in drill presses, turret lathes, and CNC screw machine setups requiring a Letter X or 0.3970 inch diameter hole.

Installation Notes

This bit is installed by machinists or maintenance mechanics in drill chucks or collet systems rated for the shank diameter. Always power down and lock out the machine spindle before changing bits. Secure the bit fully in the chuck or collet before operation to prevent slippage and bit breakage. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.