Value Collection E1419004 Solid Pilot Counterbore 8mm

Product Description

The VALUE COLLECTION E1419004 is a solid pilot counterbore designed for precision countersinking and seat-finishing operations in metalworking and machining applications. Built from cobalt steel for extended tool life in harder materials, this counterbore features a 8 mm cutting diameter, a 4.5 mm pilot diameter, and a 3-flute cutting geometry that promotes chip evacuation and smooth finish. The straight cylindrical shank measures 0.312 inches in diameter for secure chuck or holder engagement. Overall length is 88.9 mm. This tool is well suited for machinists, toolmakers, and maintenance technicians who need a reliable, single-piece counterbore for production or repair work.

This counterbore is used wherever a precision counterbored seat is required ahead of a fastener or fitting. It is appropriate for use in ferrous and non-ferrous metals, and the forward cutting direction makes it compatible with standard right-hand spindle machines including drill presses, CNC machining centers, and manual milling machines. The 4.5 mm pilot registers in a pre-drilled pilot hole to ensure concentricity of the counterbore seat with the through bore. Compatible fastener size is 4 mm.

Key Features

• Cobalt steel construction for improved hardness and heat resistance versus standard high-speed steel
• 8 mm counterbore diameter with 4.5 mm pilot diameter for accurate seat registration
• 3-flute geometry promotes chip clearance and consistent surface finish
• Straight cylindrical shank at 0.312 inches for broad chuck and collet compatibility
• Forward cutting direction compatible with standard right-hand spindle machines
• Compatible with 4 mm fasteners

Compatibility

Designed as an OEM-style replacement or direct-use solid pilot counterbore for standard right-hand spindle drilling and milling equipment accepting a 0.312-inch straight cylindrical shank, used with 4 mm fastener applications.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom personnel familiar with rotating cutting tools. Before mounting, confirm spindle speed is set appropriately for the workpiece material and tool diameter. Secure the shank fully in the chuck or collet before starting the machine, and verify pilot hole diameter matches the 4.5 mm pilot prior to operation. Always use cutting fluid appropriate to the workpiece material to maximize tool life and finish quality.