Value Collection GH8860165 Solid Pilot Counterbore Hss

Product Description

The VALUE COLLECTION GH8860165 is a solid pilot counterbore designed for precision recessing of fillister-head screws in metal fabrication and machining applications. Built from high speed steel, this tool delivers reliable cutting performance in ferrous and non-ferrous materials. It features a 13/32-inch counterbore diameter, a 1/4-inch standard pilot diameter, and two flutes for efficient chip evacuation. The straight-cylindrical shank measures 1/4 inch in diameter and seats securely in drill press chucks and milling machine spindles. With an overall length of 3-5/8 inches, the tool provides adequate reach for most standard fixturing setups. Machinists and tool-and-die technicians are the primary users of this counterbore in production and job-shop environments.

This counterbore is suited for creating clean, accurately sized seats for fillister-head screws in a range of workpiece materials. It is appropriate for use on drill presses, milling machines, and similar spindle-driven equipment where controlled depth and concentricity are required. The forward cutting direction and two-flute geometry make it a practical choice for moderate-volume production work and one-off fixturing tasks alike. No aircraft-style geometry is incorporated, making this a straightforward general-purpose counterbore for standard machining operations.

Key Features

• 13/32-inch counterbore diameter sized for fillister-head screw seating
• 1/4-inch standard pilot diameter maintains concentricity with the pilot hole
• High speed steel construction for durability across ferrous and non-ferrous materials
• Two-flute design promotes efficient chip removal during forward cutting
• Straight-cylindrical 1/4-inch shank compatible with standard drill press and milling chucks
• 3-5/8-inch overall length provides adequate reach for typical workpiece setups

Compatibility

Designed for use with fillister-head screws requiring a 13/32-inch counterbore seat. Fits standard drill press and milling machine chucks accepting a 1/4-inch straight-cylindrical shank.

Installation Notes

This counterbore should be installed by a qualified machinist familiar with spindle tooling and proper work-holding practices. Secure the workpiece firmly before engaging the cutter, and set spindle speed appropriate for the workpiece material and tool diameter. Verify pilot hole diameter matches the 1/4-inch pilot before beginning the counterbore operation to ensure concentricity. Do not exceed the tool's rated cutting capability by forcing feed rate or using it in a handheld drill.