This guide assembly provides ball bearing supports at the rear and on the sides of the blade in place of the more usual rubbing blocks. The improved support will reduce blade vibration and give a cleaner and more accurate cut. For and aft movement of both rear and side bearings is controlled by screws and the bearings themselves are mounted on eccentric bosses for precise setting of the blade clearance. Supplied as a complete set of upper and lower assemblies complete with bearings. The diameter of the mounting hole in the top casting is 22mm. When fitting these guides to your machine some modification may be needed.