Hertel 66692211 Drill Bit Size 45 Cobalt Tin 135 Deg

Product Description

The HERTEL 66692211 is a screw machine length drill bit designed for high-speed, close-tolerance drilling in metalworking applications. Built from cobalt steel with a titanium nitride (TiN) coating, it handles tough ferrous and exotic alloys where standard high-speed steel bits wear prematurely. The 135-degree split point starts on contact without a center punch and reduces walking on curved or irregular surfaces. Overall length is 1.75 inches, with a 0.75-inch flute length, making this a stub-length format suited for rigid setups in drill presses, CNC machining centers, and turret lathes. The straight-cylindrical shank measures 0.0820 inches in diameter, matching the wire gauge Size 45 drill diameter.

This bit is intended for production metalworking environments where machinists and tool-and-die professionals need a reliable, wear-resistant drill for repetitive operations. The short overall length increases rigidity and reduces deflection, which is critical when holding tight hole tolerances in steel, stainless, and heat-resistant alloys. It is also suitable for maintenance technicians and precision sheet metal workers who require accurate small-diameter holes in hard materials.

Key Features

• Cobalt steel construction with TiN coating for extended tool life in hard and abrasive materials
• 135-degree split point reduces thrust force and eliminates center-punch requirements
• Screw machine (stub) length format increases rigidity and minimizes deflection
• Web-thinned, parallel web construction improves chip clearance and cutting efficiency
• Right-hand cut with regular spiral flute for standard clockwise drilling operations
• Straight-cylindrical shank fits standard drill chucks without an adapter

Compatibility

Designed as an OEM-style replacement or direct substitute for Size 45 wire gauge screw machine length drill bits used in standard drill chucks, CNC turrets, and quick-change tooling systems accepting a 0.0820-inch straight shank.

Installation Notes

Installation and use should be performed by qualified machinists or tool operators familiar with cutting tool safety practices. Secure the shank firmly in the drill chuck or collet before operation and confirm runout is within acceptable tolerances for the application. Always bring spindle speed and feed rate into the recommended range for cobalt tooling in the workpiece material before engaging the cut. Inspect the cutting edges for wear or chipping before each use and replace the bit if damage is observed.