Value Collection GH8780264 Counterbore 13/32 in 3 Flute 1MT

Product Description

The VALUE COLLECTION GH8780264 is a 3-flute interchangeable pilot counterbore designed for precision enlarging and finishing of bolt-hole seats in metal workpieces. The 13/32-inch counterbore diameter and 5/32-inch pilot shank compatibility make it well suited for fastener clearance and spotfacing operations where accurate seating depth and concentricity are required. Constructed from high speed steel with a bright, uncoated polished finish, this tool delivers reliable performance in general machine shop and maintenance environments. The 1MT Morse taper shank provides positive drive engagement and easy removal in compatible taper-socket spindles. Overall length is 4-1/16 inches, keeping the tool rigid during moderate-depth operations.

This counterbore is used in machine shop, fabrication, and maintenance-repair-operations (MRO) settings for creating clean, flat-bottomed recesses to seat cap screws, bolts, or dowels. The interchangeable pilot design allows the operator to swap pilots to match the fastener being used, making it adaptable across a range of bolt patterns and materials. Right-hand cutting direction suits standard vertical mill, drill press, and hand-held drilling machine applications. It is appropriate for use in both job-shop and production environments where HSS tooling is acceptable.

Key Features

• 13/32-inch counterbore diameter for standard fastener seat applications
• 3-flute geometry supports smooth cutting and chip evacuation in metal
• 1MT Morse taper shank provides secure, repeatable drive in taper-socket spindles
• Interchangeable pilot accepts 5/32-inch pilot shank diameter for flexible fastener compatibility
• High speed steel construction handles a range of ferrous and non-ferrous materials
• Bright, polished finish with no coating — ready to use out of the box

Compatibility

Designed for use in Morse Taper No. 1 (1MT) spindle sockets; accepts interchangeable pilots with a 5/32-inch shank diameter. No specific OEM or model compatibility was stated in the product data.

Installation Notes

Installation and operation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully de-energized and stopped before inserting or removing the taper shank. Seat the 1MT taper firmly in the spindle socket to prevent slippage during cutting. Select the correct pilot shank diameter to match the fastener clearance hole before beginning the counterboring operation, and verify workpiece is securely clamped.