To use heating as efficiently as possible, is it desirable that the warmth is delivered to the right place. The heating pipes are suspended at the ideal height above the crops, but are able to be hoisted for several operations, for example: irrigation, harvesting or the cultivation of soil. With hoist-heating, the crops are can be supported by wire netting. For the hoisting of the growing tubes and the heaters, the reliability of fully self-locking drives is necessary. Especially when it comes to the growing tubes, these can be hoisted and lowered multiple times each day. More often than not, the lowest position of the tubes are always positioned well above the ground. Because of this, it is important that the drives are guaranteed self-locking.