Hertel 18632 Countersink 1/2 in 90 Degree 4 Flute Hss

Product Description

The HERTEL 18632 is a 4-flute high speed steel countersink designed for producing clean, accurate countersunk holes in metal and other materials. With a 1/2-inch head diameter and a 90-degree included angle, it is suited for standard flat-head fastener seating applications in production and maintenance environments. The straight cylindrical shank measures 3/8 inch in diameter, making it compatible with standard drill chucks and collet holders. Machinists, tool-and-die workers, and maintenance technicians use this type of countersink for deburring, chamfering, and fastener-seat preparation on a range of workpiece materials.

This countersink is used in general metalworking, fabrication shops, and MRO settings where consistent 90-degree countersunk profiles are required. It is appropriate for both manual drill press work and CNC operations where a straight shank is specified. The 4-flute geometry provides a balance of cutting efficiency and surface finish quality on ferrous and non-ferrous stock.

Key Features

• 1/2-inch head diameter for standard countersunk fastener seat preparation
• 90-degree included angle matches most flat-head screw and bolt standards
• 4-flute design balances stock removal rate with finish quality
• High speed steel construction provides good wear resistance across common workpiece materials
• 3/8-inch straight cylindrical shank fits standard drill chucks and collet systems

Compatibility

Designed as a general-purpose countersink for use in standard drill presses, milling machines, and handheld drill applications where a 3/8-inch straight cylindrical shank is required.

Installation Notes

Installation of countersinks should be performed by qualified machinists or technicians familiar with cutting tool practices. Secure the shank fully in the chuck or collet before operation and verify tool runout before engaging the workpiece. Use appropriate cutting fluid for the workpiece material to extend tool life and improve finish. Always power down the machine and allow the spindle to come to a full stop before changing or adjusting tooling.