High-performance heavy-duty cutting machines, with clamping lengths of up to 50 m and transit widths/heights of up to 10 m, require large telescopic covers to protect the guideway. Telescopic covers with buffer damping are an optimum solution due to the relatively slow process speeds of approx. 15 m/min. for the large mass. In addition, to prevent oil escaping (e.g. from the spindle), the telescopic covers moving vertically are designed to be impervious to spray and splashing water and have oil collection sumps.