The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.

W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.

DuraStar Thermoplastic Rubber Casters w/ 8" Wheels · 4 Styles · Up to 600 lb · Ref 40

Plate sizes: 4 x 4-1/2Bolt holes: 2-5/8 x 3-3/8 slotted to 3 x 3Diameter: 8 inTread: 2 inCapacity: up to 600 lb

Match a 4 x 4-1/2 top plate when bolting casters under finished floors and quiet institutional carts. Expect wheel diameters 8 in, thermo rubber (TPR), rubber, and stainless treads, and capacities 600 lb. Use kingpinless or heavy plate series when shock loads keep shearing kingpin races. Softer treads quiet finished floors; harder compounds last longer on chips, heat, and rough concrete. These light-duty options cover everyday finished floors and quiet institutional carts without jumping to extreme forged series.