Hertel 61699062 Screw Machine Drill Bit 0.159 in Hss

Product Description

The HERTEL 61699062 is a screw machine length drill bit designed for general-purpose metal drilling in production and maintenance applications. Built from high speed steel (HSS) with an oxide finish, this bit measures 0.159 inches (wire size #21) in diameter with a 118-degree standard point angle. The shortened screw machine length body provides increased rigidity compared to jobber-length bits, reducing deflection when drilling in tight or confined spaces. It features a straight-cylindrical shank for use in standard drill chucks and a regular spiral, two-flute configuration for efficient chip evacuation. Installed by machinists, maintenance technicians, and metalworking tradespeople.

This bit is suited for drilling mild steel, aluminum, brass, and similar materials in production screw machine work, CNC drilling, and bench drill press operations. The ANSI-specification design and 3xD flute-to-diameter ratio make it appropriate for through-hole and blind-hole work in sheet metal, structural stock, and machined components. The 0.159-inch diameter falls within the 0.1500 to 0.2000 inch size range classification. It is sold individually with a minimum order quantity of 12 units.

Key Features

• 0.159-inch diameter, wire size #21, for precise hole sizing in metal fabrication
• 118-degree standard point angle for general-purpose drilling in a wide range of materials
• High speed steel construction provides durability in metal-cutting applications
• Oxide finish improves surface hardness and reduces friction during cutting
• Screw machine length body (2.125 inches overall) increases rigidity and reduces deflection
• Right-hand cut, regular spiral, two-flute design promotes consistent chip removal

Compatibility

Designed as an ANSI-specification screw machine length drill bit compatible with standard drill chucks accepting straight-cylindrical shanks in the 0.1500 to 0.2000 inch diameter range.

Installation Notes

This bit is installed by machinists and metalworking technicians using standard drill chucks on drill presses, CNC machines, or hand drills. Ensure the workpiece is securely clamped and the machine spindle is at an appropriate speed for the material and bit diameter before drilling. Do not exceed the rated cutting capacity of the drill press or handheld tool. Use cutting fluid when drilling ferrous metals to extend bit life and improve hole quality.