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.

6" x 2.5" Polyurethane Casters

Plate sizes: 5-1/4 x 7-1/4Bolt holes: 3-3/8 x 5-1/4 slotted to 4-1/8 x 6-1/8Diameter: 6, 10 inTread: 2-1/2, 3 inCapacity: up to 3,200 lb

Match a 5-1/4 x 7-1/4 top plate when bolting casters under warehouse carts on epoxy and smooth concrete. Expect wheel diameters 6, 10 in, polyurethane and stainless treads, and capacities 2,200 to 3,200 lb. Replace worn corners in matched sets when possible so the cart tracks straight under load. Larger plates spread bolt stress on thick frames under continuous tow abuse. These heavy-duty options cover everyday warehouse carts on epoxy and smooth concrete without jumping to extreme forged series.