Hertel 67783225 Cobalt Drill Bit No 13 135 Split Point

Product Description

The HERTEL 67783225 is a cobalt threaded-shank drill bit designed for drilling into high-tensile strength materials where standard high-speed steel bits wear prematurely. It carries a No. 13 wire size designation, equal to 0.1850 inches in diameter, and features a 135-degree split point that self-centers on contact and reduces the thrust required to start a hole. The oxide coating adds surface hardness and helps resist heat buildup during aggressive cuts. Overall length is 2.125 inches with a 1.125-inch flute length, making it suitable for tight-clearance drilling applications. A 1/4-28 threaded shank ensures positive retention in compatible quick-change or threaded-chuck tooling systems.

This bit is built for trade and production environments where hard or work-hardening materials such as stainless steel, Inconel, titanium alloys, and other high-tensile metals are regularly encountered. The regular spiral flute and right-hand cutting direction are standard configurations for general-purpose through-hole drilling. The web-thinned, tapered web design reduces cutting resistance at the center of the bit, which is especially useful when drilling by hand or with lower-torque pneumatic tools common in sheet-metal and aerospace fastener work. It conforms to NAS 965 specification, which is a common requirement in aerospace and defense fabrication environments.

Key Features

• No. 13 wire size, 0.1850-inch diameter for precise hole sizing
• 135-degree split point self-centers and reduces walking on hard surfaces
• Cobalt construction with oxide coating for heat resistance in high-tensile materials
• Web-thinned tapered web lowers cutting resistance and extends tool life
• 1/4-28 threaded shank for secure retention in compatible tooling
• Meets NAS 965 specification for use in controlled fabrication environments

Compatibility

Designed for use with tooling systems that accept a 1/4-28 threaded shank. Rated for general-purpose drilling in high-tensile strength materials per NAS 965 specification.

Installation Notes

Installation and use should be performed by machinists, sheet-metal technicians, or maintenance tradespeople familiar with proper drill press or hand-drill operation. Secure the threaded shank fully in the chuck or quick-change holder before applying cutting pressure. Use appropriate cutting fluid or coolant when drilling high-tensile alloys to extend bit life and maintain hole quality. Inspect the cutting edges and split point before each use and replace the bit if chipping or excessive wear is observed.