plate 34 the stepped portions of the guide rods can be threaded and by means of nuts 35 end portions 30b and 31b can be secured to end plate 34 as shown in fig3 edge portion 33b of plate 33 is contoured to engage an extent of the outer surface of bearing sleeve 21 the contoured edge insures that the plate 33 rests securely upon the bearing sleeve end plate 34 is provided with flange or sleeve 34b which has an inside surface adapted to fit the outer surface of roll shaft 22 the length of the sleeve in the direction of the axis of the shaft insures that the sleeve and thereby end plate 34 can be securely attached to the roll shaft thereby enabling the apparatus of the invention to be held tightly in place on the printing cylinder when in use in cutting the bearing sleeve sleeve 34b can be provided with a means for mechanically locking the sleeve to the roll shaft such as thumb screw 36 having threaded shank 36a which extends through the wall of the sleeve and is threadedly engaged therewith thus tightening of the thumb screw with respect to the roll shaft mechanically locks the sleeve and thereby the apparatus of the invention to the roll shaft and with respect to the bearing sleeve to be cut means for advancing the carriage along the supporting means.