Sandvik Coromant 6255473 Hydraulic Tool Chuck C4 12mm

Product Description

The SANDVIK COROMANT 6255473 is a hydraulic tool chuck designed for precision metal-cutting applications in CNC machining environments. It features a C4 modular connection shank and accepts tooling with a 12 mm hole diameter (0.4724 inches). The chuck delivers a 135 mm projection, a 22 mm nose diameter, and a 36 mm clamping depth, making it well-suited for deep-reach and close-tolerance work. Hydraulic clamping provides consistent radial force around the tool shank, reducing runout and improving surface finish. The unit is balanced to 39,000 RPM and includes through-coolant capability to support high-speed machining with direct coolant delivery to the cutting edge.

This hydraulic chuck is intended for use on CNC machining centers equipped with a C4-compatible modular tooling interface. It suits applications in aerospace, automotive, and general precision machining where spindle speed, tool rigidity, and coolant delivery are critical. Typical installers are CNC setup technicians and tooling engineers working in production or job-shop environments. The overall installed length is 159 mm (6.26 inches), which should be accounted for in machine tool-length offsets and clearance planning.

Key Features

• C4 modular connection shank for compatibility with C4-interface spindles and tooling systems
• 12 mm hole diameter (0.4724 inches) accommodates standard tooling shanks in that bore size
• Hydraulic clamping mechanism delivers uniform clamping force and minimizes tool runout
• Balanced to 39,000 RPM for high-speed spindle applications
• Through-coolant design channels coolant directly to the cutting zone
• 135 mm projection and 36 mm clamping depth support extended-reach setups

Compatibility

Designed for use with C4 modular connection tooling systems on CNC machining centers that accept the C4 interface standard. Verify spindle interface, projection requirements, and machine tool-length capacity before installation.

Installation Notes

Installation should be performed by a qualified CNC tooling technician following the machine tool manufacturer guidelines and the chuck manufacturer torque specifications. Power down and lock out the machine spindle before mounting or removing the chuck. Ensure the mating modular connection surfaces are clean and free of chips or burrs before assembly. Confirm tool-length offset values in the machine controller after installation to prevent collision during initial proving runs.