Hertel 74130675 Cobalt Screw Machine Drill Bit Size 16

Product Description

The HERTEL 74130675 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including stainless steel, high-temperature alloys, and hardened steels. Built to wire gauge size 16 with a decimal diameter of 0.1770 inches, this bit features a 135-degree split point for self-centering entry and reduced walking on curved or hard surfaces. The overall length is 2-3/16 inches, keeping it compact for close-quarters setups common on drill presses, CNC machines, and hand drills. The web-thinned, parallel-web construction reduces thrust load during drilling. Machinists, tool-and-die technicians, and maintenance mechanics are the primary users.

This screw machine drill bit is suited for production and maintenance drilling in metalworking environments where standard jobber-length bits are too long or where rigidity is critical. The shortened flute length of 1-1/8 inches limits deflection and improves hole straightness in interrupted cuts or cross-drilled applications. The straight cylindrical shank fits standard three-jaw chucks without adapters. Typical applications include drilling pilot holes, through-holes, and clearance holes in ferrous and non-ferrous metals across manufacturing, fabrication, and MRO settings.

Key Features

• Cobalt construction provides heat resistance for drilling hard and abrasive metals
• 135-degree split point self-centers on contact, reducing drill walking
• Web-thinned parallel web lowers axial thrust and extends tool life
• Screw machine length at 2-3/16 inches overall delivers added rigidity over jobber-length designs
• Right-hand cutting, regular spiral flute for standard chip evacuation
• Straight cylindrical shank fits standard chucks without a reduction sleeve

Compatibility

Designed as a standard screw machine length drill bit for use in three-jaw drill chucks, drill presses, and CNC drilling applications accepting straight-shank tooling sized for 0.1770-inch diameter bits in the 0.1500 to 0.2000-inch decimal inch range.

Installation Notes

Secure the shank fully in the chuck and verify concentricity before beginning a drilling operation. Power down the machine and lock out the spindle before changing or inspecting bits. Use appropriate cutting fluid or lubricant when drilling hard alloys to manage heat buildup and extend tool life. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed settings appropriate to the workpiece material.