This article was updated May 5, 2023. It was originally published Sept. 24, 2009. Shaft keys—sometimes called sunk keys—transmit torque between shafts and shaft-mounted components such as gears or ...
The roles flexible couplings fill are well known – they connect imperfectly aligned shafts and transmit torque, with or without backlash. Such devices are necessary in many systems and available in ...