Accupro 40279770 Clamping Screw M6 Grooving Toolholder

Product Description

The ACCUPRO 40279770 is an M6 clamping screw designed to secure indexable inserts in GD-style grooving toolholders and cutoff tool blocks. Part of the CI series, this hex socket drive fastener is machined from steel for consistent clamping force and thread integrity under the repeated loading and vibration common in grooving and parting operations. At 20 millimeters in overall length and 0.13 pounds, it is a direct-fit replacement hardware component for machinists and toolroom technicians maintaining indexable tooling systems on CNC lathes and turning centers.

This clamping screw is used in production machining environments where GD-style grooving toolholders and cutoff tool blocks require periodic insert changes. It is appropriate for both job shop and high-volume turning operations. Technicians replacing worn or damaged clamping hardware during insert indexing will find this screw matches the standard M6 thread specification required by the toolholder system. Sold individually, it suits spot replacements without the need to purchase a full hardware kit.

Key Features

• M6 thread size for direct fitment in GD-style grooving toolholders
• Hex socket drive for precise torque application with standard Allen keys
• Steel construction resists deformation under clamping load
• 20 millimeter overall length suits standard cutoff tool block geometry
• CI series designation for straightforward cross-reference and reorder
• Sold as a single unit — order exact quantities needed

Compatibility

Designed for use with GD-style indexable grooving toolholders and cutoff tool blocks requiring an M6 hex socket clamping screw.

Installation Notes

Clamping screw replacement is performed by toolroom technicians or machinists during routine insert indexing. Ensure the machine spindle is stopped and the toolholder is secured in a vise or fixture before removing the existing screw. Use a properly sized hex key to drive the M6 fastener and avoid overtightening, which can strip threads or crack the insert. Inspect the toolholder seat and clamp pocket for debris before installing the new screw.