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.

Under 350 lbs. each
351–675 lbs. each
676–1,250 lbs. each
1,251–2,000 lbs. each
2,001–4,000 lbs. each
4,001–7,500 lbs. each
7,501–10,000 lbs. each
10,001–15,000 lbs. each
15,001–20,000 lbs. each
20,001–30,000 lbs. each
30,000+ lbs. each

6 inch wheel

Plate sizes: 4 x 4-1/2Bolt holes: 2-5/8 x 3-3/8 slotted to 3 x 3Diameter: 6 inTread: 2 inCapacity: up to 1,000 lb

4 x 4-1/2 inch top-plate casters for warehouse carts on epoxy and smooth concrete. Catalog chips cover wheel diameters 6 in, polyurethane treads, and capacities 600 to 1,000 lb. Confirm stem length and thread pitch on stem mounts so the shoulder seats flush in the boss. Bring plate and stem measurements when replacing unmarked casters so the new corners sit level.