Schaeffler adds to ballscrew drive family
Schaeffler has extended its range of ballscrew drives to include a new series of Transportation DIN standard ballscrews.
The devices in the KGT range have a contact angle of 45°. External drive forces induce an axial force, which causes axial deflection as a function of the preload.
In the case of pre-loaded single nuts, the preload is achieved by the introduction of oversize balls, resulting in four-point contact with the raceways.
Double nuts are preloaded by the use of a spacer, which sets the nut in an 'O' arrangement. In this case, the rolling elements are in two-point contact with the raceways.
The KGT series is available in accuracy class T7 (52µm variation over a 300mm axial travel) as standard, with a class T5 (23µm) option also available. Other tolerances can be supplied in accordance with ISO 3408-3 (DIN 69051).
The drives operate over a -10 to 80°C temperature range. The screw nuts (KGF/M) are protected against contamination by either a gap seal or a labyrinth seal.