Hertel 331-005060 Countersink 3/8 in 82 Degree Solid Carbide

Product Description

The HERTEL 331-005060 is a single-flute, solid carbide countersink designed for precise chamfering and seat preparation in metal and composite materials. With a 3/8 inch head diameter and an 82-degree included angle, it produces clean, accurate countersink profiles suited to flat-head fastener seating and deburring operations. The 1/4 inch straight-cylindrical shank mounts directly in standard drill chucks or collet holders. Solid carbide construction delivers superior wear resistance and edge retention compared to high-speed steel alternatives, making it a reliable choice for production and maintenance machining environments where consistent geometry is required.

This countersink is used in machine shop, fabrication, and maintenance applications where alloy steel, cast iron, or glass-reinforced plastic workpieces require countersunk fastener holes. The 82-degree included angle matches the seating geometry of standard flat-head machine screws used in many industrial assemblies. It is suitable for use in drill presses, CNC machining centers, and hand-held pneumatic or electric drills when paired with an appropriate collet or chuck. The single-flute design reduces chatter and produces a smooth finish on the countersink seat.

Key Features

• 3/8 inch head diameter with 82-degree included angle for flat-head fastener seating
• Solid carbide cutting head for extended tool life in hard and abrasive materials
• Single-flute geometry minimizes chatter and improves surface finish
• 1/4 inch straight-cylindrical shank for compatibility with standard drill chucks and collet holders
• Right-hand cut for conventional clockwise-rotation spindles
• Suitable for alloy steel, cast iron, and glass-reinforced plastic workpieces

Compatibility

Designed for countersinking operations in alloy steel, cast iron, and glass-reinforced plastic. Compatible with any drill press, machining center, or handheld drill equipped with a 1/4 inch collet or chuck. No pilot is included.

Installation Notes

This countersink is installed by a machinist or maintenance technician into a standard 1/4 inch collet or drill chuck. Ensure the spindle is fully stopped and the machine is powered down before tool changes. Set spindle speed appropriate for the workpiece material and tool diameter per tooling manufacturer guidelines. Secure the workpiece firmly before beginning the countersinking operation to prevent tool deflection or workpiece movement.