Устройство механического разжимного вала, аналога пневмовала. От заокеанских конкурентов.

The MS--1000 mechanical shaft provides the best gripping force of any core shaft available today. It is designed with greater structural strength and a powerful expansion mechanism to handle the heaviest roll weights at high speeds. No compressed air is needed to operate this mechanical shaft, yet expansion and retraction is easily accomplished with just five (or fewer) turns of the activating screw .