RCK55 self-centering adapter sleeve, 40 × 50, is a clamping sleeve in the RCK 55 family designed to mate with compatible RCK 55 clamping elements. It provides precise concentric engagement between a 40 mm shaft and the accompanying hub, enabling rigid torque transmission in rotating assemblies. The standard part number for this size is 06550040, and the sleeve is used in machine-tool applications where repeatable, secure workholding is required. Designed for use with matching adapters and ferrules in the RCK 55 line, it supports reliable clamping performance in milling and turning setups.
