Stainless Steel Model 50 Heavy Duty Kingpinless Swivel Casters are the heaviest duty stainless caster that we manufacture. Stainless Steel Model 50 swivel casters feature an integrated 3” diameter swivel bearing under the mounting plate and 3” wide wheels. Constructed from 304 SS, this precision machined swivel caster provides superior performance on both manually moved and mechanically powered equipment. There are lubrication fittings for all moveable parts and the stainless axle diameter is ¾”. Capacity up to 3000 lbs per caster, depending on the wheel. NSF and ROHS Compliant.