Do a research about the expected life of gears bearing and shafts and in another paragraph about power from a motor delivered to a gear drive that controls a floor crane.

Perform research to determine the fundamentals to select the gear drives.
Expected life (how many hours before the replacement) for gears, bearings, and shaft
Power (from the motor) to be delivered.

Just do a small research about the expected life of gears bearing and shafts and in another paragraph about power from a motor delivered to a gear drive that controls a floor crane.