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.

8" x 2" Poly-on-Aluminum Casters

Plate sizes: 4 x 4-1/2Bolt holes: 2-5/8 x 3-5/8Diameter: 8 inTread: 2 inCapacity: up to 1,250 lb

Casters on the 4 x 4-1/2 plate pattern suit warehouse carts on epoxy and smooth concrete. Expect wheel diameters 8 in, polyurethane treads, and capacities 1,250 lb. Harder poly rolls easier on smooth epoxy; softer poly cushions vibration on uneven slabs. Replace worn corners in matched sets when possible so the cart tracks straight under load. These medium-duty options cover everyday warehouse carts on epoxy and smooth concrete without jumping to extreme forged series.