... installation, use for a long time. Types : support Unit of Ball Screw BK,BF,EF,EK,FF,FK Fixed side: BK10,BK12,BK15,BK17 ... ,FK30Supported side:FF6,FF10,FF12,FF15,FF17,FF20,FF25,FF301. Support unit of ball screw-FK, specifications the same as THK . Used on ... in this field,WE Welcome friends all over the world! support units of ball screw/ball screw support unit FK&FF