RWM Casters is the inventor of the Kingpinless™ caster and the recognized market leader for industrial casters. Now copied worldwide, the Kingpinless™ caster is known today overseas as the “American-style caster.” Our original patented design, having never been improved upon by others, is the recognized best solution for demanding and abusive applications. Don’t purchase an inferior knock-off—contact RWM Casters for the proven winning solution.



Wheel Size

Wheel Width



A Kingpinless raceway is constructed of a top plate with inner raceway and an outer raceway to which legs are welded for the wheel. The outer raceway is mated to the inner raceway using a series of ball bearings installed through a loading hole. This load hole is then sealed and the caster is permanently fixed together. The Kingpinless design eliminates the leading cause of caster failure creating a far more robust product capable of handling heavier loads, more abusive applications, and higher towing speeds.The 47, 65, 70, 75, 76, 85, 95 and 125 Series Casters are RWM Kingpinless™ Casters. We invented and patented this design, and it has proven itself to be the best solution for demanding applications, with a capacity of 350 to 40,000 lbs. This is the heavy-duty caster design that all other industrial caster manufacturers are now copying because it is simply unmatched in extending service life, reducing all possible causes for caster failure.

Kingpinless Caster Features

Kingpinless™ Caster Features & Design Benefits

Compared to the traditional casters, the Kingpinless™ caster is far superior, specially designed and constructed to eliminate the need for a kingpin. As the illustration to the left shows, the construction is fairly straightforward.

The RWM Casters-patented Kingpinless™ caster design is superior due to the offset, precision-machined raceway.

This feature exerts radial force evenly where there is full contact between the ball bearing and the raceway.

The result is that there are no direct “hammering” forces on the intersections of the raceways, which means:

  • Vastly reduced raceway wear
  • Elimination of the “pull apart” forces of stress in the swivel section
  • Smoother swiveling action
  • Exceptional maneuverability
  • Longer service life and less maintenance
  • Extra impact resistance
  • High radial force absorption

Our unique Kingpinless™ caster design adds more mass at key points. This, plus more thorough heat treatment, provides additional strength and combats brinelling into the core material.

RWM Casters Versus Other Industrial Caster Manufacturers

The inline positioning of the majority of our competitor’s raceways creates a direct “hammering” effect via the ball bearings. The reason is that the ball bearings are centered on the tangent of the two raceways, thus savaging and eventually eroding the raceway. This inevitably causes a loose fit and progressive swivel failure.

Even a double raceway configuration is subject to these same “hammering” hazards. The machining requirements of the competition to accommodate a swivel lock reduces strength, leading to premature fatigue, stress fractures of the raceway, and eventual failure.

RWM Kingpinless™ casters function flawlessly, even at high speeds, without shimmy. Our swivel section tolerances are .017, compared with .030 for the competition. This differential represents the amount of play between the top plate and the swivel yoke. The more precise the machining is, the closer the tolerance; the closer the tolerances, the longer the service life.

Kingpinless™ Casters Raceway

Our Kingpinless™ casters raceway provides the additional mass necessary for a double weld on its legs, inside and outside, as opposed to the competition’s single weld. Their machining process does not provide the necessary mass for a weld on the outside race.

Tests prove that RWM caster legs have a 74% higher yield strength and a 74% higher ultimate strength when compared to the competition. RWM caster carbon content, the essential ingredient for strength in steel, is nearly seven times higher than the competition. The steel in an RWM caster raceway is superior in its heat treatment and nearly 18% harder than the competition. As a result, the RWM caster welded-in race is nearly 20% better equipped than the competition to resist brinelling, allowing the swivel section to turn easily in the roughest applications.

For ultimate dependability, choose RWM Kingpinless™ Casters. Our USA-made casters are the perfect solutions for applications across various industries, from the aerospace and automotive industries to tire manufacturing, construction, and more.

If our standard product line of industrial casters and wheels doesn’t meet your specifications, give us a call. Custom design and production of custom industrial casters for application-specific standards is our specialty!

Can’t find what you’re looking for? or call 800-634-7704 for larger sizes and special set-ups.