One way clutch Bearing with Keyway 

Application:

CSK series one way (direction) bearing consists of a standard ball bearing, in-built special snap block and cage, widely used in mining machinery, washing machine, hydraulic machinery, printing machines, textile machinery, conveyor systems.
Freewheel-Clutches - Examples
Important applications
conveyers (back stopping)
conveyers (speed compensation)
copiers (paper feeding)
furniture production (glue roller drive)
high voltage switches
mixers (safety clutch)
motor bikes (automatic gear)
packaging machines (overrunning clutch)
paper handling (material feed)
printing presses (ink roller drive)
sowing machines (seed feeder)
textile machines (material feed)
winches (backstop)