PLANETARY SCREW DRIVE Planetary screw drive PWG the name of this tech nical component doesn t necessarily exude linguistic elegance nor suggests that it might be the basis of an exciting story about hospital beds robots and a Space Shuttle mission But continue reading and find out how the PWG became part of the Schaeffler world A customer inquiry got the ball rolling this is our problem do you have an idea how to solve it Business as usual at Schaeffler Developing solutions on an equal footing with the customer Customers have great confidence in the sup plier s development and manufacturing expertise This particular case was about screw drives Their performance limit had been reached in the customer s application so something new was needed a powerful linear actuator in other words a device that electromechanically moves PRECISE MOTION a load on a straight line The system was to be compact powerful and equally important affordable This was by no means a challenge to be mastered in a snap The road to the perfect solution was long The proj ect billed as High Performance Smart Actuator began with market research because it was clear that an eco nomically and technically feasible solution would not be achievable without the required production volumes The results of the survey were extremely positive More than 80 potential applications were identified for the new prod uct from riveting machines plier welding heads and clamping cylinders to hospital beds and dental chairs We found that aesthetically appealing design plays an increasingly important role also for all kinds of technical Dietmar Rudy 50 51

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