Abstract: A suspended material handling unit has a simplified, compact and economical thrust and limited rotational bearing means between relatively fixed and limited rotational components of the unit. Both lifting and down pressure reaction forces are transmitted through the double-acting thrust bearing in such a way that screws which connect a thrust bearing cap to the limited rotational component are relieved of the comparatively heavy down pressure reaction forces. The rotational bearing means immediately below the double-acting thrust bearing spans a substantial axial distance in the telescoped components and provides lateral stability in the unit.

Abstract: A rotational grapple adapted for attachment to the boom of a construction machine possesses both lifting and downward pressure capabilities through a unique thrust bearing arrangement. A rotational sleeve component capable of carrying grapple jaws or a lifting magnet is swiveled to a relatively stationary shaft structure which is suspended from a crane boom or the like through a universal pivot. A drive flange on the rotational sleeve component is engaged frictionally by a hydraulically powered motor wheel which is suspended floatingly on the non-rotatable shaft structure and urged into engagement with said drive flange by adjustable tension spring means. Grapple jaw operating cylinders on the rotational component are included in hydraulic circuits through the sleeve component and within said relatively stationary shaft structure.