Accupro ACC-RAD4 Concave Radius Cutting Tool Bit 1/8 in

Product Description

The ACCUPRO ACC-RAD4 is a concave RAD style radius cutting tool bit designed for precision radius form turning on manual and CNC lathes. It measures 2.5 inches in overall length with a 3/8 inch square shank, a 3/8 inch long tip, and a 3/32 inch tip thickness. The carbide tip delivers consistent radius geometry at 1/8 inch, suited for generating smooth concave profiles in metal workpieces. This is a right-hand cutting tool, meaning it cuts when feeding from right to left. Machinists and tool-and-die technicians install this bit into standard square-shank tool holders for radius grooving, form turning, and profile finishing operations.

This tool bit is intended for use in metalworking applications where a repeatable 1/8 inch concave radius profile is required. Typical use cases include turning radius relief grooves, form features on shafts, and decorative or functional radii on round stock. The RAD style configuration is common in production turning environments where interchangeable form tools are needed for consistent part geometry across runs. The right-hand orientation suits the majority of standard engine lathe and turret lathe setups.

Key Features

• Carbide tip construction for wear resistance and extended tool life in metal cutting
• 1/8 inch concave radius geometry for precise form turning
• 3/8 inch square shank fits standard square-shank tool holders
• Right-hand cut direction — feeds right to left
• 3/8 inch tip length with 3/32 inch tip thickness for controlled depth engagement
• RAD style designation for compatibility with form tool holder systems

Compatibility

Designed as an OEM-style form tool bit for use in standard 3/8 inch square-shank tool holders on manual and CNC lathes.

Installation Notes

This tool bit is installed by qualified machinists into a compatible square-shank tool holder or turret block. Secure the shank fully in the holder and confirm center height alignment before cutting. Power down and lock out the machine spindle before seating or removing the tool bit. Inspect the carbide tip for chips or wear before each use, as a damaged tip will affect radius accuracy and surface finish.