In addition, the Kingpinless design features 3/8â diameter HRC45 steel ball bearings which absorb thrust and load in severe environments.
Featuring a Kingpinless hot forged ASTM1045 steel design that increases caster durability and integrity, the series KP30 eliminates problems associated with kingpin failure due to severe shock loading. Even drywall carts, welding carts, and wall panel carts will be ready to roll on the Series KP30. Listing is for a set of four (4) Service Caster Series #KP30 casters, two (2) swivel casters with side lock brakes & bolt on swivel locks and two (2) swivel casters with a bolt on swivel locks, with 6" diameter by 2" wide semi steel cast iron wheels capable of supporting a total weight of 4,800 lbs. These cast iron based wheels feature a machined hub and wheel face.