The wss is a type of universal joints coupling which is a important member of shaft coupling, our products are widely used in various filed. There are some characteristics about universal joints coupling wss as follows: 1)Precision double joint - extendable, maximum articulation angle 45?for each joint; 2)Bridging of bigger shaft distances; 3) Type A (plain bearing) nmax. = 1000 min-1; 4)Type HA(needle bearing) nmax. = 4000 min-1; 5)Available with finish bore H7 - on request available with keyway, thread for setsscrews, square hexagon bore.