Folding drive arm suitable for Fermator busmatic doors. The drive arm apart from connecting the movement of the drive shaft to the movement of the door panels also contains a microswitch operates when an obstruction is detected in the opeing and closing movement of the doors. The microswitch when in it's rest postion is N/C.
This drive arm is suitable for clear openings of 850mm which is the distance between the door panels when the doors are fully closed. Another clear indication of which door operator this drive arm is used on is ny measuring the overall width of the operator (also known as ENTERANCE) which should be 900mm for this drive arm to be selected.
The drive arms installed at the the factory have two lengths of leads (one longer than the other), this is because one drive arm is closer to the control board and therefore can be slightly smaller. When you order this item we always supply the longer leads to ensure it is universal.