Precision spiral ring chuck made of steel with cylindrical centering according to DIN 6350. The chuck enables uniform clamping force by centric clamping jaws as well as high runout accuracy. Three-jaw chucks with base plate allow an easy mounting on different machine tables with T-slot 14 mm or on customer-specific mounting hole pattern. Features: - High precision - High clamping force - Wide clamping range - For external and internal clamping - Material: steel - Finish: hardened and grinded (step jaws)