Hertel 89320980 Drill Bit Letter I 0.272 in 118 Deg Hss

Product Description

The HERTEL 89320980 is a screw machine length drill bit sized at Letter I (0.2720 inches decimal equivalent) with a 118-degree point angle ground from high-speed steel. Screw machine length bits are shorter than jobber length, giving them added rigidity for accurate starting and reduced deflection in production drilling, turret lathe, and drill press applications. The bright uncoated finish keeps the surface as-ground with no additional coating, making it a reliable general-purpose option for drilling steel, aluminum, cast iron, and similar common materials. Right-hand cut, 118-degree split or standard point geometry suits a wide range of through-hole and blind-hole drilling tasks encountered daily in machine shops and maintenance environments.

This bit is suited to general-purpose drilling in both production and maintenance settings. The shorter overall length of 2.6875 inches and 1.5-inch flute length make it well-matched to screw machine turrets, CNC lathes, drill presses, and handheld power drills where stub-length tooling provides better control. It is a practical choice for machinists, maintenance technicians, and fabricators working with ferrous and non-ferrous metals, plastics, and composite materials in light-to-medium duty operations.

Key Features

• Letter I size — 0.2720 inch decimal equivalent for close-tolerance hole sizing
• 118-degree point angle for general-purpose drilling across a broad range of materials
• High-speed steel construction provides hardness and heat resistance for metal drilling
• Screw machine (stub) length adds rigidity and reduces deflection compared to jobber length bits
• Bright uncoated finish — no coating to chip or peel, consistent performance out of the box
• Right-hand cut geometry compatible with standard drill chucks and turret tooling

Compatibility

Designed as a general-purpose screw machine length drill bit fitting standard drill chucks and turret holders that accept round-shank tooling in the 0.2500 to 0.3000 inch decimal inch size range.

Installation Notes

Secure the bit firmly in a properly sized drill chuck or turret holder before operation and verify runout before drilling critical-tolerance holes. Use appropriate cutting fluid or coolant when drilling steel or cast iron to extend tool life and improve hole finish. Inspect the cutting edges for wear or chipping before each use and regrind or replace the bit when point geometry is degraded. Follow shop safety procedures including eye protection and secure workpiece fixturing at all times.