[Posted June 20, 2014 by: John E. Schroeder]
Rotary shafts are involved with rotating clockwise, counter, or both. In order for it to turn effectively, it needs to be protected inside of lubricant. The lubricant is ultimately what allows it to turn smoothly. If there is not enough lubricant or the lubricant becomes tainted, the rotary shaft becomes worn and that leads to the need to replace it. The rotary shaft seal then becomes just as important of a part.