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

4" x 1.25" Polyolefin Casters

Diameter: 4 inTread: 1-1/4 inCapacity: up to 275 lb

This collection gathers plate-mount casters used on light institutional and furniture-grade frames. Expect wheel diameters 4 in, polyolefin treads, and capacities 275 lb. Use kingpinless or heavy plate series when shock loads keep shearing kingpin races. Match bolt-hole spacing or stem diameter to the frame before you standardize a fleet. These light-duty options cover everyday light institutional and furniture-grade frames without jumping to extreme forged series.