... high loading capacity: 1-30tons 3. wheel gauge: 600,etc Mine car wheel sets factory.1. material: ... cast steel or cast iron 2. constitute: two wheels, one axle, four bearings, and other parts.3 ... . loading capacity: 1-25tons, each one is ok.4. wheel sets gauge: 600mm ... capacity mine car, mining car wheels, wheel pairs, wheel sets, U channel steel beam arch, ...