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" Casters

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

Industrial tread compounds casters here serve light institutional and furniture-grade frames. Expect wheel diameters 3-1/2, 4, 5 in, plate-mount frames, and capacities 250 to 300 lb. Confirm stem length and thread pitch on stem mounts so the shoulder seats flush in the boss. Softer treads quiet finished floors; harder compounds last longer on chips, heat, and rough concrete. These light-duty options cover everyday light institutional and furniture-grade frames without jumping to extreme forged series.