Hertel 61698494 Screw Machine Drill Bit 5/8 in Hss

Product Description

The HERTEL 61698494 is a screw machine length drill bit designed for high-speed steel cutting in metal fabrication, machining, and general industrial drilling applications. Built from high-speed steel with an oxide coating, it features a 118-degree standard point angle and a 5/8-inch diameter (0.6250 inches decimal). The shortened overall length of 4-1/4 inches compared to jobber-length bits makes it well suited for work in drill presses, CNC machines, and turret lathes where rigidity and reduced deflection matter. This is a general-purpose bit appropriate for shops, machinists, and maintenance professionals working with ferrous and non-ferrous metals.

This drill bit is sized for applications requiring a 5/8-inch hole in production machining or bench-drilling environments. Its 2-3/4-inch flute length and 3xD flute-to-diameter ratio are optimized for chip evacuation in short, controlled cuts. The straight cylindrical shank seats securely in standard drill chucks and collet holders. It is a practical choice for maintenance technicians, tool-and-die shops, and machine shops running repetitive drilling operations on metal workpieces.

Key Features

• 5/8 inch (0.6250 inch) diameter for precise hole sizing in metal stock
• 118-degree standard point angle for general-purpose entry and centering
• High-speed steel construction provides durability across a wide range of metals
• Oxide coating reduces friction and helps extend cutting edge life
• Screw machine length (4-1/4 inches OAL) improves rigidity and reduces runout versus jobber-length bits
• Right-hand cut with 2-flute spiral design for efficient chip removal

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks and collet systems accepting a straight cylindrical shank at 5/8 inch diameter. Conforms to ANSI specification designation.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance professionals familiar with rotary cutting tools. Secure the shank fully in the chuck or collet before operation and verify runout before beginning a cut. Always wear appropriate eye protection and ensure the workpiece is clamped securely. Do not exceed the recommended cutting speed or feed rate for the material being drilled.