The working principle of the tower crane slewing mechanism is to ensure its working coverage by the rotation of the boom. The slewing motion is generated by the upper and lower slewing bearings respectively mounted on the inner and outer rings of the slewing bearing, and the slewing mechanism drives the pinion, which meshes with the large gear of the slewing bearing, driving the upper slewing bearing to move relative to the lower bearing. 

Tower crane RCV/SVF Slewing Mechanism includes four parts: slewing motor, slewing reducer, slewing bearing, lower and upper support (slewing table)

Model:  RCV185 Slewing Mechanism

Speed:  0.7r/Min

Motor Power:2X185nm

Packing and shipping: in Nude with Steel Band

Accessories: Motor, Reducer, Upper and Lower Slewing table, slewing bearing, and set of pins

ZTM improves the design concept,  for the key structure, we adopt mortise and tenon structures, and about welding, we adopt multiple layers and multiple passing welding to prevent weld cracks and ensure the safety of structural parts, increase the reliability and service life of the crane.
Multi-layer weld bead

Chinese traditional architecture mortise and tenon