... 4500 hours 1,The material of the floating seals is a special chrome molybdenum cast ... sec (max).6,The size of the floating seals are various,the outer diameter is from ... 45-1425mm7,Our floating seals are used in construction machinery and mining machinery , like komatsu ... excavators Japanese Komatsu hydraulic excavators; (4)Various loaders and land levelers, cranes, mixers, mining machines, etc ...