Hertel 61698767 Screw Machine Drill Bit 41/64 in Hss

Product Description

The HERTEL 61698767 is a screw machine length drill bit designed for general-purpose metal drilling in production and shop environments. Built from high-speed steel with an oxide coating, this bit delivers consistent performance in ferrous and non-ferrous materials. It features a 118-degree standard point angle and measures 0.6406 inches (41/64 inches) in diameter with a 4.5-inch overall length. The straight-cylindrical shank seats securely in standard drill chucks. Machinists, tool-and-die techs, and maintenance mechanics working on screw machine setups or drill press operations will find this bit suited for repetitive hole-making tasks requiring a compact flute-to-length ratio.

This bit is intended for use in screw machines, drill presses, and CNC drilling setups where a stubby, rigid configuration is needed to minimize deflection. The 3xD flute-by-diameter ratio keeps the cutting geometry compact, making it appropriate for through-hole and blind-hole applications in metal fabrication, MRO, and light production work. The right-hand spiral flute evacuates chips efficiently during standard drilling operations. Coolant-through capability is not available on this bit, so external flood or mist coolant is recommended for higher-duty cycles.

Key Features

• 41/64 inch (0.6406 inch) diameter with a 118-degree standard point for clean entry on ferrous and non-ferrous materials
• High-speed steel construction rated for general-purpose drilling across a broad range of workpiece materials
• Oxide coating helps reduce friction and provides basic surface protection during operation
• Screw machine length (4.5 inches OAL) provides added rigidity and reduces bit deflection compared to jobber-length equivalents
• 2-flute right-hand spiral design for efficient chip evacuation in standard drilling applications
• Straight-cylindrical shank compatible with standard drill chucks and collet systems

Compatibility

Designed as an OEM-style general-purpose screw machine drill bit suitable for use in standard drill chucks and collet holders accepting a straight-cylindrical shank in the 41/64 inch diameter range.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and locked out before installing or removing the bit from the chuck or collet. Verify chuck jaw seating and tighten securely before operation to prevent slippage. External coolant or cutting fluid is recommended when drilling at elevated feed and speed rates, as this bit does not support coolant-through delivery.