Hertel 61699799 Screw Machine Drill Bit 0.157 in Hss

Product Description

The HERTEL 61699799 is a screw machine length (stub-length) high speed steel drill bit designed for general-purpose drilling in metal, wood, and plastics. Measuring 0.157 inches (No. 22 wire gauge) in diameter with a 118-degree standard point angle, it is shorter and more rigid than jobber-length bits, which reduces deflection and improves hole accuracy in production drilling environments. The 2-flute spiral flute design promotes efficient chip evacuation, while the oxide finish provides light corrosion resistance and reduces friction during cutting. Machinists, toolroom technicians, and maintenance mechanics use this bit in drill presses, CNC machines, and hand drills.

This bit is suited for light- to medium-duty drilling in screw machine shops, fabrication facilities, and maintenance applications where a compact, rigid drill is preferred. Its straight-cylindrical shank seats securely in standard drill chucks without requiring a collet or adapter. The general-purpose grade and ANSI specification designation make it a reliable shelf stock item for production and repair work across metal and non-ferrous material applications.

Key Features

• 0.157 inch diameter, No. 22 wire gauge sizing for precise hole matching
• 118-degree standard point angle for general-purpose material entry
• High speed steel construction for durability across a range of workpiece materials
• Oxide finish reduces friction and provides light corrosion resistance
• Screw machine (stub) length at 2-1/8 inches overall for improved rigidity and reduced deflection
• Right-hand cut, 2-flute spiral design for efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose screw machine length drill bit conforming to ANSI standards, compatible with standard drill chucks accepting straight-cylindrical shanks in the 0.150 to 0.200 inch diameter range.

Installation Notes

This bit is installed and operated by machinists and mechanical tradespeople using drill presses, lathes, CNC equipment, or hand drills. Ensure the chuck is fully tightened and the shank is fully seated before operating. Use appropriate cutting fluid when drilling ferrous metals to extend tool life and improve hole finish. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.