Hertel 74129214 Straight-flute Carbide Drill Bit 7/32 in

Product Description

The HERTEL 74129214 is a straight-flute, solid carbide drill bit designed for precision drilling in hard and difficult-to-machine metals. Built from C2-grade carbide with a bright/uncoated finish, this bit measures 7/32 inch (0.2188 inches) in diameter and features a 140-degree notched point for accurate self-centering and reduced thrust in tough materials. The web-thinned design improves chip clearance and lowers the cutting load. Diameter tolerance is held to +0.0000 to -0.0005 inches, making it a reliable choice for close-tolerance work. This bit is intended for use by machinists and tool-and-die professionals working in production or maintenance environments.

This drill bit is suited for drilling chrome alloy, heat-treated alloy, nickel alloy, stainless steel, carbon steel, and titanium alloy workpieces. Its straight-flute geometry is well matched to applications requiring controlled chip evacuation in short-hole drilling operations, including fixtures, tooling plates, and component fabrication. The right-hand cutting direction and two-flute configuration make it compatible with standard drill presses, CNC machining centers, and manual lathes. It ships individually and is sold in single-unit quantities.

Key Features

• Solid C2-grade carbide construction for extended tool life in hard-metal drilling
• 140-degree notched point for self-centering and reduced entry thrust
• Web-thinned geometry lowers cutting force and improves chip flow
• Tight diameter tolerance of +0.0000 to -0.0005 inches for close-tolerance hole sizing
• Bright/uncoated finish suitable for use with or without cutting fluid
• Right-hand, two-flute straight-flute design compatible with standard machine spindles

Compatibility

Designed for use in drilling chrome alloy, heat-treated alloy, nickel alloy, stainless steel, steel, and titanium alloy workpieces. Suitable for use with standard drill press chucks, CNC machining centers, and lathe tailstocks accepting a 7/32 inch (0.2188 inch) straight shank.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with cutting tool safety practices. Secure the workpiece firmly before initiating the cut, and confirm spindle speed and feed rate are appropriate for the workpiece material before use. No coolant-through capability is available on this bit; apply cutting fluid externally when required by the workpiece material. Inspect the cutting edges before each use and remove the bit from service if chipping or wear is detected.