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.

Hamilton Combination Brake BC Series Casters w/ Plastex Phenolic Wheels · Up to 850 lb

Plate sizes: 3-1/8 x 4-1/8Bolt holes: 1-3/4 x 2-15/16 slotted to 2-3/8 x 3-3/8Diameter: 3 inTread: 1-3/4 inCapacity: up to 450 lb

Casters on the 3-1/8 x 4-1/8 plate pattern suit bake carts, metalworking fixtures, and debris-heavy floors. Typical builds show wheel diameters 3 in, phenolic treads, and capacities 450 lb. Use kingpinless or heavy plate series when shock loads keep shearing kingpin races. When floors see chemicals or washdowns, prefer sealed bearings and non-absorbent wheel compounds. These light-duty options cover everyday bake carts, metalworking fixtures, and debris-heavy floors without jumping to extreme forged series.