The KS Drive (Ball Disc Drive) is a metal to-metal traction drive that provides infinitely variable speeds down to zero by employing balls as power transmitting element, whereby power can be transmitted down to zero speed of the output shaft. Speed of the basic drive (variator) may be varied sensitively from zero up to 1.2 times of the input speed.

Principle of Operation:

  • Both the input and output shafts carry a flat disco A rotating cage of steel balls rolls between two plane radially displaced discs.
  • The torque is transmitted by positive metallic traction through the balls from the input shaft to the output shaft.
  • The ball cage can be adjusted by means of the control device and the control screw parallel to the surface of the discs.
  • The ratio setting is determined by the position of the ball cage.