Accolift Motorized Trolleys are rugged in design and built to be flexible right out of the box. Each trolley is adjustable for a beam flange range of 3.25? to 12? with no additional materials required. Side guide rollers are included to promote smooth trolley motion and to minimize wheel and beam flange wear. Wheels are dual tread design for operation on tapered or flat flange beams. Trolleys include drop down lugs and rubber bumpers as standard equipment. Motor includes class F insulation and a disc type motor brake. Motor is rated for 30-minute duty and includes standard thermal protection. Three phase trolleys include a VFD control, 2-button pendant, control transformer and a 30? power cord. Single phase trolleys include a single speed contactor control, 2-button pendant and a 30? power cord.