91 Series Casters – 20,000 Lbs Max Capacity – 8.5 x 8.5 Top Plate – Kingpinless

Swivel Section: Constructed of hot forged C-1045 steel, the single ball race design features 7/8 inch diameter load/thrust ball bearings in a 7 inch diameter precision machined raceway.

Kingpin: Kingpinless style design

Legs: 1/2 inch by 4 inch laser cut legs. Formed on a CNC press brake and continuously welded inside and outside to the yoke base

Axle: 1.25 inch, Grade 5 axle with fine threads plated finish.

Lubrication: Pre-lubricated before shipping

Wheels: 6 inch to 18 inch diameters are available in roller bearing , tapered bearing or precision ball bearing

Height: 9.50 inches – 21.00 inches

Swivel Lead: 2.25 inches -4.0 inches

Finish: Gold dichromate plating. Wet paint and powder coat are optional finishes.

91 Series Kingpinless Caster


The 91 Series Extra Heavy Duty Kingpinless Caster has become a highly accepted industrial caster while evolving into a valuable investment for rugged applications by minimizing maintenance costs. It is valued for its simplicity and providing a tough caster for industrial applications where shock loading is prevalent. The top plate and yoke base are held in alignment with 3/4 inch high quality hardened ball bearings. The construction of the swivel section puts the ball bearing in a sheer load that provides great strength while providing smooth operation when swiveling in a loaded state. The ease of swiveling leads to very long lifecycles and many years of low cost operation.


Click Infographic To Enlarge

Click Infographic To Enlarge



Suitable for power drawn applications, fiberglass mold dollies, aircraft wing and spar tooling, machinery, engine and paint line dollies, body dolly carts, material carts, chassis rack carts, towed trash gondolas, aircraft maintenance stands, production line delivery trailers and automated guide vehicles. To maximize the life of the entire caster be sure you are selecting the correct wheel for your caster application.

Custom CAD


Caster Concepts has a wide variety of caster options. Many of these not only improve function – but also provide safety and add longevity to the product. When considering safety options, the most common consideration would be caster locks, caster brakes, toe guards, and reinforced legs. Options that extend the life of a caster are primarily options that seal the bearing of the caster to prevent contamination of the precision parts.

Other options include threaded zerks for when an application is difficult and high level of maintenance is required and track brush wipers that keep debris from stopping movement or damaging a wheel. These options can be added at the time of manufacturing or after the caster is fully assembled.