Alvord Polk 03087 Solid Pilot Counterbore Hss 0.8465 in

Product Description

The ALVORD POLK 03087 is a solid pilot counterbore designed for precision recess cutting in metal fabrication and machining applications. It features a counterbore diameter of 0.8465 inches and a pilot diameter of 0.5709 inches, making it compatible with 0.5512-inch socket-head cap screws. The tool is manufactured from high speed steel (HSS) with a bright, uncoated finish for general-purpose cutting. The straight-cylindrical shank measures 0.625 inches in diameter and the overall length is 7.5 inches. Forward cutting direction suits standard drill press and milling machine setups. This tool is appropriate for machinists, tool and die technicians, and maintenance professionals performing counterbore operations on metal workpieces.

This counterbore is suited for creating recessed seating for socket-head cap screws in steel, aluminum, and similar machinable materials. It fits standard toolholding setups with a 0.625-inch shank and is well suited for production or maintenance environments where consistent counterbore depth and concentricity are required. The 14.00 mm fastener size compatibility (metric equivalent) broadens its usefulness across mixed-standard assemblies. Standard pilot style ensures accurate bore alignment without requiring a separate pilot pin.

Key Features

• Counterbore diameter of 0.8465 inches for socket-head cap screw seating
• Standard pilot diameter of 0.5709 inches for accurate bore alignment
• Compatible with 0.5512-inch (14.00 mm) socket-head cap screws
• High speed steel construction for durability in general machining
• Straight-cylindrical shank at 0.625 inches for standard toolholder fitment
• Bright, uncoated finish suitable for use with cutting fluids
• Forward cutting direction for use on standard drill presses and mills

Compatibility

Designed for use with 0.5512-inch and 14.00 mm socket-head cap screws. Fits toolholders and chucks accepting a 0.625-inch straight-cylindrical shank.

Installation Notes

Installation and operation should be performed by a qualified machinist familiar with counterboring procedures. Secure the workpiece firmly before operation and ensure the tool is properly seated in the chuck or toolholder. Use appropriate cutting fluid for the material being machined to extend tool life and maintain bore quality. Always power down the machine and confirm the spindle has stopped before changing or inspecting tooling.