Hertel 66692302 Screw Machine Drill Bit Size 2 Cobalt

Product Description

The HERTEL 66692302 is a screw machine length drill bit designed for high-productivity drilling in metal fabrication, machining, and general manufacturing applications. Built from heavy-duty cobalt steel and coated with TiAlN for extended tool life at elevated cutting temperatures, this bit handles tough ferrous and non-ferrous materials without rapid edge breakdown. The 135-degree split point geometry starts on contact without center-punching, reducing walking and improving positional accuracy. At 2-7/16 inches overall length, the shortened body delivers added rigidity compared to jobber-length bits, making it well suited for CNC machines, drill presses, and screw machine work where runout and deflection must be minimized.

This bit is used in metal-cutting environments where heat and tool wear are primary concerns. The TiAlN coating performs well in dry or minimally lubricated cutting conditions, especially in stainless steel, alloy steel, cast iron, and high-temperature alloys. It is a standard choice for production machining shops, tool rooms, and maintenance environments requiring consistent, repeatable hole quality. The 0.2210 inch diameter corresponds to wire gauge size 2, making it a direct fit for applications specifying that size designation.

Key Features

• Heavy-duty cobalt steel construction resists heat and abrasion in tough materials
• TiAlN coating extends cutting life and reduces friction at high surface speeds
• 135-degree split point eliminates center-punch requirement and reduces thrust force
• Web-thinned parallel web reduces cutting resistance without sacrificing rigidity
• Screw machine length body provides extra stiffness and reduced deflection versus jobber-length bits
• Straight-cylindrical shank fits standard drill chucks and collet holders without modification

Compatibility

Designed as a screw machine length replacement or production drill bit for setups requiring wire gauge size 2 (0.2210 inch diameter) in any drill press, CNC machining center, or screw machine accepting a 0.2210 inch straight-cylindrical shank.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and the spindle at a complete stop. Secure the straight-cylindrical shank firmly in a properly sized drill chuck or collet to the chuck manufacturer's torque specification. Inspect the cutting edges and TiAlN coating for chipping or wear before each use, as a damaged edge will compromise hole quality and increase the risk of bit breakage. Always follow applicable machine shop safety practices and applicable OSHA standards when operating drilling equipment.