Albion 94BBL Super Duty Casters utilize a ball load swivel section. The swivel load raceway uses a 5â€-diameter ball load race with 1/2″ steel balls hardened for greater resistance to wear and brinelling. The raceway is protected by a forged labyrinth skirt. The thrust raceway uses a 1-1/4â€ tapered roller bearing. Combined with AISI 1405 drop forged steel top plate and yoke base, 94BBL casters have a long life with large weight capacities, perfect for very rugged applications.