Sandvik Coromant 6255545 Hydraulic Chuck CAT50 25mm

Product Description

The SANDVIK COROMANT 6255545 is a hydraulic tool chuck designed for precision metal-cutting applications on CAT50 taper-shank spindles. It uses hydraulic clamping force to grip cutting tools with high concentricity, reducing runout and extending tool life compared to conventional mechanical chucks. The bore accepts tools up to 25 mm in diameter, and the chuck supports through-coolant delivery, directing fluid directly to the cutting zone. With a balanced speed rating of 12,000 RPM, it suits both roughing and finishing operations on machining centers. Licensed machinists and CNC setup technicians are the primary installers.

This chuck is used on vertical and horizontal machining centers equipped with CAT50 spindle interfaces. The 87 mm projection and 41 mm clamping depth make it appropriate for applications requiring reach into deep pockets or past fixture obstructions. Through-coolant capability suits high-speed operations where heat management and chip evacuation are critical, such as deep-bore drilling, reaming, and finish milling. The overall length of 188.80 mm should be accounted for when programming tool offsets and confirming clearance within the work envelope.

Key Features

• Hydraulic clamping provides high concentricity and consistent grip force on 25 mm shank tools
• CAT50 taper shank for direct mounting to standard CAT50 spindles without adapters
• Through-coolant passage supports pressurized coolant delivery to the cutting edge
• Balanced to 12,000 RPM for stable high-speed machining operations
• 87 mm projection and 57 mm nose diameter suit reach-critical setups
• 41 mm clamping depth ensures secure tool engagement across compatible shank lengths

Compatibility

Designed for use with CAT50 taper-shank spindle interfaces on CNC machining centers. Accepts cutting tools with a 25 mm cylindrical shank within the specified clamping depth of 41 mm.

Installation Notes

Installation should be performed by a qualified CNC machinist or toolroom technician. The spindle must be fully stopped and the machine placed in a safe, locked-out state before chuck mounting or tool changes. Use the appropriate CAT50 pull stud and confirm torque to the machining center manufacturer's specification. Verify tool projection and runout with a dial indicator before initiating a cutting cycle.