Hertel 61698510 Screw Machine Drill Bit 7/8 in Hss

Product Description

The HERTEL 61698510 is a screw machine length drill bit designed for high-volume drilling in metal, plastic, and general-purpose shop materials. Built from high-speed steel with an oxide finish, it measures 7/8 inch in diameter with a 118-degree standard point angle and a 5.5-inch overall length. The shorter-than-jobber body reduces deflection and improves rigidity in drill press, turret lathe, and screw machine applications. The 2-flute spiral design clears chips efficiently while maintaining accurate hole entry. This bit is a standard tool for machinists, tool and die workers, and production shop technicians working with close-tolerance bores.

This drill bit is suited for production drilling environments where stub-length rigidity is preferred over jobber-length reach. Typical applications include CNC turret setups, manual drill presses, and bench-top screw machines working in ferrous and non-ferrous metals, thermoplastics, and general shop stock. The oxide coating provides mild lubricity and corrosion resistance during dry or minimal-lubrication cutting. The straight-cylindrical shank seats reliably in standard drill chucks and collet holders without requiring special tooling.

Key Features

• 7/8 inch diameter with 0.8750 decimal inch precision sizing
• 118-degree standard point angle for general-purpose material entry
• High-speed steel construction for strength and heat resistance
• Oxide coating provides lubricity and mild corrosion protection
• Screw machine length body at 5.5 inches OAL reduces deflection versus jobber bits
• Right-hand spiral cut with 3.5-inch flute length for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks and collet systems

Compatibility

Designed as a general-purpose screw machine length drill bit conforming to ANSI specification, suitable for use in standard drill chucks and collet holders accepting a straight-cylindrical shank at 7/8 inch diameter.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians following standard shop safety practices. Secure the shank fully in the chuck or collet and verify runout before cutting. Power down and de-energize the machine before changing or inspecting any tooling. Follow ANSI B11 machine tool safety standards and the tool manufacturer's recommended feed and speed guidelines for the workpiece material.