Switching cams for Bosch door drives Comfortlift Profilift, GTT Standard Bosch and Somfy garage door drives from previous generations used switching cam technology to limit the path of the garage door. These switching cams (item no. 8782329149) are simply clipped onto the chain and create contact between the two switching brackets inside the device through pressure. For correct operation, 2 switching cams (upper and lower end positions) are required for the Somfy Keasy S drives as well as Bosch Comfortlift 7781999110, 7781999104, Profilift 7781999105 and GTT Standard 7781999129.
