The Core of Precision Machining: Hydraulic, Collet, and Power Chucks.
In the demanding world of CNC machining, the choice of a workholding device—or chuck—is critical for achieving accuracy, stability, and production efficiency. The three primary types of chucks used for both tool holding and workpiece clamping are Hydraulic Chucks, Collet Chucks, and Power Chucks, each engineered for specific applications and performance needs. Hydraulic Chuck A hydraulicchuck is a high-precision tool holder used predominantly for clamping cutting tools on CNC milling centers. It excels in applications requiring exceptionally low runout and excellent vibration damping. Key Features & How It Works Mechanism: The chuck body contains an internal chamber filled with hydraulic oil. When a side-mounted set screw is tightened, it compresses the fluid. This pressure forces a thin, internal sleeve to expand uniformly in a 360-degree circle, clamping the tool shank with minimal runout (typically $\le 3\ \mu\text{m}$). Clampin...