Product Name Heavy Duty Q345B Steel Wire Rope Drum for 50 Ton Double Girder Trolley Overview This steel wire rope drum is a core winch component matched for 50 ton double girder overhead crane trolley . Fabricated from Q345B low alloy structural steel, the drum features excellent yield strength, impact resistance and fatigue resistance.Precise rope groove machining ensures orderly wire rope winding, effectively preventing rope extrusion, abrasion and disordered winding.