Schunk 205644 Hydraulic Tool Chuck BT30 1/2 Inch Through Coolant

Product Description

The SCHUNK 205644 is a hydraulic tool chuck designed for precision machining applications on BT30 taper spindles. It uses hydraulic clamping force to grip cutting tools with exceptional concentricity, holding tools with a bore diameter of 12.70 mm (0.500 inches). The chuck offers a projection of 50.80 mm and a clamping depth of 46.00 mm, making it well suited to operations that require both reach and rigid tool engagement. Balanced to 25,000 RPM and equipped with through-coolant capability, this chuck supports high-speed milling, drilling, and reaming while delivering cutting fluid directly to the tool tip. It is installed by machinists and CNC setup technicians on machining centers with BT30 spindle interfaces.

This chuck is used in CNC vertical and horizontal machining centers equipped with BT30 taper spindles. It is appropriate for high-speed finishing passes and precision hole-making operations where runout control is critical. The through-coolant feature makes it a practical choice for deep-pocket milling, long-reach drilling, and hard-material cutting where flood coolant alone is insufficient. Typical tool diameters for this chuck are 1/2 inch shank end mills, drills, and reamers.

Key Features

• Hydraulic clamping delivers consistent grip force and low runout, rated at 0.003 mm TIR
• Balanced to 25,000 RPM for high-speed spindle compatibility
• Through-coolant design channels cutting fluid directly to the tool cutting edge
• BT30 taper shank integrates directly with BT30 spindle interfaces without adapters
• 46.00 mm clamping depth provides secure tool engagement and reduced vibration
• 32.00 mm nose diameter supports close-clearance machining near workpiece fixtures

Compatibility

Designed as an OEM-style replacement and direct-fit chuck for CNC machining centers with BT30 taper spindle interfaces accepting 12.70 mm (1/2 inch) bore hydraulic chucks.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down and lock out the machining center spindle before mounting or removing the chuck. Ensure the spindle taper and chuck shank are clean and free of chips, oil film, or burrs before seating. Through-coolant fittings must be properly connected and tested for leaks before returning the machine to service.