7. IN A RECIRCULATING WAY BEARING IN COMBINATION, AN INNER RACE BODY PROVIDING A CONTINUOUS ABLONG TRACK HAVING A PAIR OF OPPOSITELY DISPOSED PARALLEL SIDES, SAID SIDES BEING SUBSTANTIALLY FLAT AND ONE COMPRISING A LOAD SURFACE AND THE OTHER A RETURN SURFACE, AND A PAIR OF OPPOSITELY DISPOSED ARCUATE TRACK END PORTIONS, SAID FLAT SIDES AND ARCUATE END PORTIONS TOGETHER COMPRISING SAID CONTINUOUS TRACK, A PLURALITY OF ROLLERS DISPOSED ON SAID TRACK AND MOVABLE AROUND THE SAME IN SUBSTANTIALLY ABUTTED RELATION TO ONE ANOTHER, SAID ROLLERS BEING GENERALLY CYLINDRICAL AND EACH HAVING A REDUCED DIAMETER CENTRAL PORTION APPROXIMATELY MIDWAY BETWEEN ITS ENDS, A STATIONARY GENERALLY RECTILINEAR GUIDE RAIL EXTENDING LONGITUDINALLY ALONG SAID LOAD SURFACE AND PROJECTING THEREFROM SO AS TO EXTEND INTO THE REDUCED DIAMETER CENTRAL PORTIONS OF ROLLERS MOVING ON SAID LOAD SURFACE WHEREBY THE ROLLERS STRADDLE SAID GUIDE RAIL, AND AN ENDLESS ELASTIC TENSION BAND OF A WIDTH APPROXIMATELY EQUAL TO THE LENGTH OF SAID REDUCED DIAMETER CENTRAL PORTION OF EACH OF SAID ROLLERS, SAID BAND BEING NON-METALLIC AND HIGHLY FLEXIBLE BOTH RADIALLY AND LATERALLY AND EXTENDING AROUND THE PERIPHERY OF SAID OBLONG TRACK SO AS TO OVERLIE THE REDUCED DIAMETER CENTRAL PORTIONS OF SAID ROLLERS AND THEREBY MAINTAIN SAID ROLLERS IN CLOSE ASSOCIATION WITH SAID TRACK AND IN PROPER ALIGNMENT THEREON.