Hertel 89321376 Screw Machine Drill Bit 1-1/4 in Hss

Product Description

The HERTEL 89321376 is a screw machine length drill bit designed for high-volume drilling in metal fabrication, machining, and industrial maintenance applications. Built from high-speed steel with a bright uncoated finish, it measures 1-1/4 inches in diameter and carries a 118-degree split-point angle suited for general-purpose drilling into a wide range of ferrous and non-ferrous materials. At 6-3/4 inches overall length with a 4-3/8 inch flute length, the shorter-than-jobber-length body provides added rigidity and reduced deflection, making it well suited for drill press and CNC work where runout control matters.

This bit is used in screw machine operations, production drilling, and general-purpose shop work where a stubby, rigid drill profile is preferred over standard jobber-length tooling. The right-hand cut geometry works with conventional spindle rotation. Machinists, maintenance technicians, and tool and die professionals typically reach for screw machine length bits when drilling into steel plate, cast iron, aluminum, and similar materials where chatter and deflection must be minimized.

Key Features

• 1-1/4 inch diameter for large-bore drilling in production and maintenance settings
• 118-degree point angle for general-purpose use across a broad range of materials
• High-speed steel construction provides toughness and heat resistance during high-rpm operation
• Bright uncoated finish — no coating buildup to affect tolerances on critical fits
• Screw machine length body (6-3/4 inches OAL) delivers rigidity and reduced deflection versus jobber-length alternatives
• Right-hand cut for use with standard clockwise spindle rotation

Compatibility

Designed as a general-purpose screw machine length drill bit suitable for use in drill presses, CNC machining centers, and manual milling machines accepting 1-1/4 inch diameter tooling with appropriate chuck or collet capacity.

Installation Notes

Installation of this bit requires a chuck, collet, or adapter rated for 1-1/4 inch shank diameter. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the bit with sufficient grip length to prevent pullout under load. Follow applicable machine shop safety practices and manufacturer spindle speed recommendations for the workpiece material and bit diameter.