One of the many design variables when considering the best solution for your heavy duty industrial caster application is whether to include a kingpin vs. kingpinless swivel caster construction.
A stem, typically a threaded bolt with slotted nut or sometimes a rivet is used to fasten the components of the swivel section to the top plate. The swivel action is centered about the kingpin. The kingpin design utilizes a load bearing and thrust bearing to transmit the load.
Thrust loads of the caster are transmitted through the kingpin, making it a vulnerable failure point for the caster. The kingpin could become fatigued, distorted, or even sheared off. Kingpin constructed casters are normally not used for higher loads, higher impact, and higher speed applications.
A kingpinless swivel section has fewer components, a top plate with a ball race, a yoke base (bottom race, and ball bearings.
Adjusting the swivel motion of the caster becomes much more difficult. Once the swivel raceways have worn, there is no way to adjust for this wear.
Kingpin vs. Kingpinless Swivel Casters Summary:
Both designs have their pros/cons. It is important to have a full understanding of the caster’s intended application including loading conditions, speeds, duty cycles, floor/ground conditions, and other environmental concerns. We encourage you to contact our applications staff at email@example.com when making your caster selection.