Expanding Mandrels

• 360° Uniform Radial Expansion: Unlike traditional three-jaw chucks or collets, the hydraulic system provides full-circumference radial pressure. This ensures evenly distributed clamping force and significantly reduces the risk of workpiece deformation.

• Superior Concentricity & Repeatability: Hydraulic transmission eliminates mechanical backlash, delivering exceptional repeatability (down to the micron level) and substantially increasing production yield rates.

• The Ideal Solution for Thin-Walled Parts: The gentle and uniform distribution of compressive stress makes it perfect for machining thin-walled sleeves, precision gears, and precision bearing housings—parts that are highly susceptible to distortion.

• High Rigidity & Vibration Damping: The internal hydraulic fluid possesses natural shock-absorbing properties, effectively suppressing micro-vibrations during machining to optimize surface roughness (Ra values).