Powerful upper pressure plate holds wood stably. 4 sets steel feed rollers combined with two sets table rollers provide extra powerful feeding force that assures extremely smooth feed during ripping operation. A trimming sawblade is equipped at the inner side of the saw arbor to trim the inner side of wood. It provides consistent width and thickness of product after ripping. The external end of saw arbor is supported by bearing for added stability of running and accurate size of cut.