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.

4" x 1.25" Polyolefin Casters

Diameter: 3-1/2, 4, 5 inTread: 1-1/4 inCapacity: up to 300 lb

4" x 1.25" Polyolefin Casters for light institutional and furniture-grade frames. You will see wheel diameters 3-1/2, 4, 5 in, polyolefin treads, and plate-mount frames across the SKUs listed below. Match bolt-hole spacing or stem diameter to the frame before you standardize a fleet. Size capacity from the heaviest corner load with shock margin, and keep overall height consistent across the set. These light-duty options cover everyday light institutional and furniture-grade frames without jumping to extreme forged series.