Harvey Tool 25660 Combo Drill Countersink Size 4 Solid Carbide

Product Description

The HARVEY TOOL 25660 is a solid carbide combined drill and countersink designed for precision drilling and countersinking in a single operation. With a 5/16-inch body diameter and a 1/8-inch drill point diameter, this tool creates accurately sized pilot holes and chamfered seating surfaces simultaneously. The 118-degree drill point angle and 82-degree included angle make it well suited for standard fastener countersink profiles. At 2-1/2 inches overall length, the 25660 is compact and rigid, reducing deflection during use. It is intended for professional machinists, toolmakers, and fabricators working in metalworking and precision manufacturing environments.

The HARVEY TOOL 25660 is used in metalworking shops, machine shops, and fabrication facilities where trade size 4 combined drill and countersink tooling is required. The double-end configuration extends tool life by providing two usable cutting ends. Right-hand cutting direction suits standard CNC and manual drill press setups. The bright uncoated finish makes it appropriate for a range of ferrous and non-ferrous workpiece materials where coating compatibility is a consideration.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision machining
• Double-end design provides two cutting ends, extending usable tool life
• 118-degree drill point angle with 82-degree included angle for standard countersink profiles
• Right-hand cut compatible with conventional CNC machining centers and drill presses
• Bright uncoated finish suitable for general metalworking applications
• Plain cutting edge style on a combined drill and countersink series

Compatibility

Designed as an OEM-style replacement or direct-use combined drill and countersink for trade size 4 applications in standard machine tool holders and collet chucks accepting a 1/8-inch drill point shank.

Installation Notes

Installation and use of this tooling should be performed by qualified machinists or toolroom professionals familiar with cutting tool setup and speeds and feeds for carbide tooling. Secure the tool firmly in an appropriate collet or tool holder before operation, and verify runout before cutting. Carbide tooling is brittle and should not be subjected to shock loading or excessive side pressure. Follow applicable shop safety procedures and machine guarding requirements during all machining operations.