assembled wire rollelr(ceramic roller): applicable for reasonable guiding of various enameled wires and silks. the middle ceramic coil is made of precise ceramic and matched with high-speed bearing. the groove is polished to ra0.2. baffles in both sides can prevent the enameled wire to jump out of the groove during winding and the winding tension can be maintained in a stable manner. or, whole ceramic is combined with high-speed bearing, which is called ceramic roller and is applicable for wire or rolling of various winding machines and textile machinery.