Hertel 61698783 Screw Machine Drill Bit 47/64 in Hss

Product Description

The HERTEL 61698783 is a screw machine length drill bit designed for high-throughput drilling in metal fabrication, machining, and general mechanical work. Built from high-speed steel (HSS) with an oxide coating, it features a 118-degree standard point angle and a right-hand spiral flute configuration. The shorter overall length of 5 inches compared to jobber-length bits improves rigidity and reduces deflection in screw machine and drill press applications. The straight cylindrical shank provides solid chuck engagement across standard drill chucks. This bit is sized at 47/64 inch (0.7344 inches) in diameter, placing it in the heavy-end fractional range appropriate for structural and precision machining work.

Screw machine length drill bits like the 61698783 are used in turret lathes, screw machines, drill presses, and CNC setups where a shorter, stiffer tool reduces runout and improves hole accuracy. The 3-1/8 inch flute length provides adequate chip clearance for moderate-depth holes in ferrous and non-ferrous materials. This bit suits general-purpose applications including through-hole drilling in steel, aluminum, and similar stock. It is a staple for machine shops, maintenance facilities, and tool rooms requiring consistent performance in repetitive drilling operations.

Key Features

• 47/64 inch (0.7344 inches) diameter for precision fractional sizing
• 118-degree standard point angle for general-purpose use across common metals
• High-speed steel construction with oxide coating for heat and wear resistance
• Screw machine length (5 inches OAL) improves rigidity and reduces deflection
• 3-1/8 inch flute length with regular spiral for efficient chip evacuation
• Right-hand cutting, straight cylindrical shank for standard chuck compatibility

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks and collet systems accepting straight cylindrical shanks in the 47/64 inch diameter range. Conforms to ANSI specification designation.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or mechanical tradespeople familiar with rotating cutting tools. Secure the straight shank firmly in a properly sized drill chuck or collet before operation, and verify chuck runout is within acceptable tolerance for the application. Always wear appropriate eye protection and ensure the workpiece is clamped securely. Do not exceed the rated cutting speeds for the material being drilled, and use appropriate cutting fluid when drilling ferrous metals to extend tool life.