Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a stationary cylindrical support body. A rotatable driving wheel is supported by a driving wheel roller bearing at the stationary cylindrical support body. The rotatable driving wheel is configured to be driven by the internal combustion engine. A pump wheel is arranged at a rotatable rotor shaft. The pump wheel is supported by a shaft roller bearing at the stationary cylindrical supporting body. A switchable friction clutch is configured to couple the rotatable driving wheel with the pump wheel. The stationary cylindrical support body integrally comprises an inner ring of the driving wheel roller bearing. The stationary cylindrical support body integrally comprises an outer ring of the shaft roller bearing.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a pump wheel. A rotor shaft is arranged at the pump wheel. The rotor shaft is rotatable and radially supported. A driving wheel is rotatable, radially supported is driven by the internal combustion engine. A connecting device is connects the rotor shaft with the driving wheel so as to be rotatably fixed. A first roller bearing comprises a separate outer bearing ring. The separate outer bearing is directly fixed to a pump frame body. The first roller bearing directly radially supports the rotor shaft or the driving wheel. A separate bearing fixation structure axially pushes the separate outer bearing ring of the first roller bearing so as to be clearance-free against the pump frame body so that the separate bearing fixation structure is directly fixed to the pump frame body.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a stationary cylindrical support body. A rotatable driving wheel is supported by a driving wheel roller bearing at the stationary cylindrical support body. The rotatable driving wheel is configured to be driven by the internal combustion engine. A pump wheel is arranged at a rotatable rotor shaft. The pump wheel is supported by a shaft roller bearing at the stationary cylindrical supporting body. A switchable friction clutch is configured to couple the rotatable driving wheel with the pump wheel. The stationary cylindrical support body integrally comprises an inner ring of the driving wheel roller bearing. The stationary cylindrical support body integrally comprises an outer ring of the shaft roller bearing.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a pump wheel. A rotor shaft is arranged at the pump wheel. The rotor shaft is rotatable and radially supported. A driving wheel is rotatable, radially supported is driven by the internal combustion engine. A connecting device is connects the rotor shaft with the driving wheel so as to be rotatably fixed. A first roller bearing comprises a separate outer bearing ring. The separate outer bearing is directly fixed to a pump frame body. The first roller bearing directly radially supports the rotor shaft or the driving wheel. A separate bearing fixation structure axially pushes the separate outer bearing ring of the first roller bearing so as to be clearance-free against the pump frame body so that the separate bearing fixation structure is directly fixed to the pump frame body.