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.

Hamilton Unilast UY Wheels w/ 4" Wheels · 1/2 Bearings · Up to 3,200 lb · Polyurethane

Diameter: 4 inTread: 1-1/4, 2 inCapacity: up to 3,200 lb

Hamilton Unilast UY Wheels w/ for warehouse carts on epoxy and smooth concrete. Expect wheel diameters 4 in, polyurethane treads, and industrial frames. Softer treads quiet finished floors; harder compounds last longer on chips, heat, and rough concrete. Bring plate and stem measurements when replacing unmarked casters so the new corners sit level. These heavy-duty options cover everyday warehouse carts on epoxy and smooth concrete without jumping to extreme forged series.