Keo 902-000-035 Solid Pilot Counterbore 1.203 in 3 Flute

Product Description

The KEO 902-000-035 is a solid pilot counterbore designed for precision spot-facing and counterboring operations on metal workpieces. It features a 1.203-inch cutting diameter, an oversize pilot diameter of 0.781 inches, and three flutes for efficient chip evacuation. Constructed from cobalt steel, the tool handles tough ferrous materials without premature edge wear. The straight-cylindrical shank measures 0.75 inches in diameter and the overall length is 7 inches, making it suitable for standard drill press, milling, or CNC setups. Machinists, tool-and-die workers, and maintenance technicians install this tool where socket-head cap screw seat geometry must be accurately cut or refinished.

This counterbore is sized specifically for 0.75-inch socket-head cap screws and is used in production machining, maintenance repair, and fabrication environments. The oversize pilot registers against a pre-drilled clearance hole to keep the counterbore concentric during the cut. Forward cutting direction makes it compatible with standard right-hand spindle machines. Typical applications include creating or cleaning up fastener seats in steel plate, structural weldments, and machined assemblies where socket-head cap screws must sit flush or below the surface.

Key Features

• 1.203-inch counterbore diameter sized for 0.75-inch socket-head cap screw seats
• Oversize pilot diameter of 0.781 inches for positive hole registration and concentricity
• Three-flute geometry promotes chip clearance during the cut
• Cobalt steel construction provides heat and wear resistance in ferrous materials
• Bright uncoated finish allows easy visual inspection of cutting edges
• 7-inch overall length accommodates standard spindle reach requirements

Compatibility

Designed for use with 0.75-inch socket-head cap screws. Fits straight-cylindrical tool holders and collet chucks accepting a 0.75-inch shank diameter. Suitable for use in drill presses, knee mills, and CNC machining centers with right-hand spindle rotation.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician. Secure the 0.75-inch straight shank firmly in a collet or end-mill holder before operation and verify runout before cutting. Always power down and lock out the spindle before changing or inspecting the tool. Do not exceed the recommended feed and speed parameters for cobalt tooling in the material being machined.