Value Collection GH8780181 Counterbore 9/32 in 3 Flute 1MT

Product Description

The VALUE COLLECTION GH8780181 is a 9/32 inch interchangeable pilot counterbore designed for precision countersinking and seat preparation in metalworking applications. Built from high-speed steel with a bright, uncoated polished finish, this tool delivers consistent cutting performance across a range of ferrous and non-ferrous materials. The 1MT Morse taper shank provides secure, repeatable tool holding in compatible drill presses and milling machines. With 3 right-hand cutting flutes and an overall length of 3.8125 inches, the GH8780181 is suited for shop operations where accurate counterbore depth and concentricity are required.

This counterbore is intended for use in machine shop, maintenance, and fabrication environments where interchangeable pilot systems are already in place. The 1MT Morse taper shank is compatible with drill presses, knee mills, and machining centers equipped with a No. 1 Morse taper socket. A pilot shank diameter of 3/32 inch guides the tool accurately into pre-drilled holes. It is typically installed and operated by machinists, tool-and-die technicians, and maintenance mechanics performing bolt seat and fastener clearance work.

Key Features

• 9/32 inch counterbore diameter for precise fastener seat preparation
• 3 right-hand cutting flutes for smooth material removal
• No. 1 Morse taper (1MT) shank for secure machine tool holding
• High-speed steel construction for durability across common workpiece materials
• Bright, uncoated polished finish — no additional coating to affect dimensional tolerances
• Interchangeable pilot design accepts 3/32 inch pilot shanks

Compatibility

Designed for use with interchangeable pilot counterbore systems accepting a 3/32 inch pilot shank diameter. Fits machine tool spindles with a No. 1 Morse taper (1MT) socket.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician. Ensure the machine spindle is fully powered down and at rest before seating or removing the Morse taper shank. Clean both the tool taper and the spindle socket before seating to ensure full contact and prevent runout. Verify pilot shank fit and tool concentricity before beginning the cut.