Hertel 61698601 Screw Machine Drill Bit 27/32 in Hss

Product Description

The HERTEL 61698601 is a screw machine length drill bit designed for high-speed steel cutting in metal fabrication, machining, and general industrial applications. Built from high-speed steel with an oxide coating, it features a 27/32-inch diameter, a standard 118-degree split point, and a right-hand cut. The shorter-than-jobber overall length of 5-3/8 inches provides added rigidity in drill press and screw machine setups, reducing deflection on through-hole and blind-hole operations. Machinists, tool and die technicians, and maintenance professionals install this bit in production and repair environments.

This drill bit is suited for general-purpose drilling in steel, cast iron, aluminum, and similar materials. The screw machine length format makes it a common choice for turret lathes, CNC machining centers, and bench drill presses where a shorter, stiffer bit improves accuracy. The 2-flute spiral design with a 3xD flute-to-diameter ratio provides adequate chip evacuation for most through-hole and moderate-depth drilling tasks. ANSI specification designation confirms dimensional compliance with standard tooling references.

Key Features

• 27/32-inch (0.8438 inches decimal) diameter for precise fractional sizing
• 118-degree standard point angle for general-purpose entry on a wide range of metals
• High-speed steel construction with oxide coating for surface hardness and corrosion resistance
• Screw machine length at 5-3/8 inches OAL delivers greater rigidity than jobber-length equivalents
• Right-hand cut with 2-flute regular spiral for efficient chip removal
• ANSI-compliant straight cylindrical shank fits standard drill chucks without modification

Compatibility

Designed as a general-purpose replacement or production drill bit compatible with standard straight-shank drill chucks and collet holders accepting a 27/32-inch cylindrical shank, conforming to ANSI screw machine length specifications.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard keyed or keyless drill chuck rated for the shank diameter. Ensure the machine spindle is fully stopped and locked out before changing bits. Secure the shank fully into the chuck to the recommended engagement depth to prevent slippage under load. Do not use this bit in hammer-drill mode; it is intended for rotary cutting only.