Monorail trolley is a device used to suspend equipment like a chain hoist from a beam. It helps the equipment to move horizontally. Mostly, a monorail trolley features two side plates which hold two wheels. It can be pushed or pulled along the beam while holding the equipment.
Geared monorail trolley works like a chain block: it moves along the beam by a hand chain. Pulling the hand chain rotates the gears which rotate the trolley’s wheels to move smoothly and controllably along the beam.