Hertel 61699351 Screw Machine Drill Bit 23/64 in Hss

Product Description

The HERTEL 61699351 is a screw machine length drill bit designed for high-speed steel cutting in metal fabrication, machining, and general-purpose drilling applications. The 23/64-inch (0.3594 inches decimal) diameter bit features a 118-degree standard point angle and a two-flute spiral configuration that promotes efficient chip evacuation. At 3-1/16 inches overall length with a 1-3/4-inch flute length, this stub-length drill offers added rigidity compared to jobber-length bits, reducing deflection in tight setups. The oxide coating provides light surface protection. This bit is intended for right-hand cutting and fits standard drill chucks via its straight cylindrical shank.

This drill bit suits general-purpose drilling in metal, plastics, and similar materials on drill presses, CNC machines, and handheld power tools. The stub screw machine length format is a common choice in production machining environments where shorter flute lengths improve concentricity and reduce chatter. Machinists, tool and die technicians, and maintenance mechanics typically use this style when clearance is limited or when drilling through thin stock and sheet metal. The 3xD flute-to-diameter ratio and regular spiral geometry make it a reliable fit for repetitive hole production in shop and field settings.

Key Features

• 23/64-inch diameter (0.3594 inches decimal) for precise hole sizing
• 118-degree standard point angle for general-purpose material entry
• High-speed steel construction with oxide coating for light corrosion and wear resistance
• Screw machine (stub) length at 3-1/16 inches OAL for increased rigidity and reduced deflection
• Two-flute regular spiral geometry supports consistent chip removal
• Right-hand cut with straight cylindrical shank for compatibility with standard drill chucks

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks and collet holders accepting a straight cylindrical shank in the 0.3500 to 0.4000 inches decimal size range per ANSI specification.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with rotating cutting tools. Secure the straight cylindrical shank fully in the chuck before operation and confirm runout is within acceptable limits for the application. Always wear appropriate eye protection and follow applicable machine guarding requirements. Coolant-through operation is not supported by this bit; apply cutting fluid externally when drilling ferrous materials to extend tool life.