If you’re using a large Uhing drive then you might realize 15 feet of travel. The longer the travel distance for a Uhing drive, the thicker the shaft must be to compensate for shaft sag. And the thicker the shaft, the more powerful the drive. This is fine for heavy, robust applications requiring a lot of side thrust. But a Uhing drive may not be practical for an application with a long travel stroke and a very low thrust requirement. A long stroke requires a thick shaft which means the Uhing drive will have a lot of side thrust. This means you end up with a very powerful unit when all that is needed is a very light duty unit. Contact Amacoil to see if a Uhing drive is right for your application.