Medium duty caster bracket first consider the weight of castor, such as supermarkets, schools, hospitals, office buildings, hotels and other places, due to the good ground, smooth and light handling of goods (each castor bearing 50-150kg), suitable for the choice of thin steel plate 3-4mm stamping forming electroplating wheel frame, the wheel frame is light, flexible operation, quiet and beautiful, the plating wheel frame according to the ball The arrangement is divided into double rows of beads and single rows of beads, if often moving or handling the application of double rows of beads; In factories and warehouses and other places, the cargo handling is very frequent and the load is heavy (each castor bearing 150-680kg) is suitable for the use of thick steel plate 5-6 mm stamping hot forging and welding of double row ball wheel frame; If used to move heavy objects such as textile factories, automobile factories, machinery factories and other places