Hertel 61699229 Screw Machine Drill Bit 0.161 in Hss

Product Description

The HERTEL 61699229 is a screw machine length drill bit designed for high-speed, short-reach drilling in metal fabrication, maintenance, and production environments. Built from high speed steel with an oxide finish, this bit measures 0.161 inches in diameter (Wire Size 20) and features a 118-degree standard point angle suited for general-purpose drilling in steel, cast iron, aluminum, and similar materials. At 2.125 inches overall length, the screw machine format is shorter than jobber-length bits, improving rigidity and reducing deflection in drill press and CNC turret applications. The straight-cylindrical shank seats securely in standard drill chucks. This is a single-piece package unit with a minimum order quantity of 12.

This drill bit is intended for general-purpose shop drilling tasks including tap-hole preparation, clearance holes, and production runs in light to medium-duty metalworking. Its 1.0625-inch flute length and 3xD flute-to-diameter ratio make it well-suited for shallow-to-moderate depth holes where rigidity is a priority over deep-hole chip evacuation. Machinists, tool-and-die technicians, and maintenance professionals working in production shops or field repair settings will find this bit appropriate for frequent, repetitive drilling operations on metal workpieces.

Key Features

• Wire Size 20 designation at 0.161 inches diameter for precise hole sizing in metal applications
• 118-degree standard point angle provides self-centering entry on flat and curved metal surfaces
• High speed steel construction with oxide finish for improved wear resistance and heat management
• Screw machine length body at 2.125 inches overall reduces deflection compared to jobber-length alternatives
• Two-flute regular spiral design promotes consistent chip evacuation during drilling
• Straight-cylindrical shank compatible with standard three-jaw drill chucks

Compatibility

Designed as a general-purpose screw machine length drill bit for use with standard drill presses, CNC turret machines, and hand drills equipped with three-jaw chucks accepting straight-cylindrical shanks in the 0.150 to 0.200 inch diameter range per ANSI specification.

Installation Notes

This drill bit should be installed by securing the straight-cylindrical shank fully into a properly sized drill chuck and tightening with a chuck key before operation. Ensure the drilling machine is powered off and brought to a full stop before changing bits. Use appropriate cutting fluid or coolant for the workpiece material to extend bit life, noting this bit does not support internal coolant-through delivery. Follow applicable ANSI and shop safety standards for rotating tool operation, including the use of eye protection and proper workpiece clamping.