Casters handle loads up to 1,200 lbs.
Caster Concepts offers a line of casters that it claims are maintenance-free. They can handle loads up to 1,200 lbs. by distributing downward pressure over a large area. Derived from a traditional caster using a bearing race held together by a kingpin, the kingpinless swivel bearing holds the yoke and the plate together without chatter at all speeds.
There is no nut to be retightened on the swivel section. The caster, which accommodates high-speed, high-capacity applications, comes in diameters of 4, 6, 8, and 10 in.