It’s that time of year again. Practices gradually become shorter, the yards start to decrease, and the energy is at an all-time high. It’s taper time. For swimmers, tapering marks the beginning of ...

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 ...