Sr-737/747/757 multi needle high speed industrial overlock machine. Characteristics: Sr-737/747/757 multi needle high speed industrial overlock machine is designed with advanced technology, newest design, excellent appearance, automatic lubrication device. Application: Sr-737/747/757 multi needle high speed industrial overlock machine is suitable for overlock sewing thin, medium and thick fabrics due to its automatic lubrication device, the overlock machine operates perfectly and smoothly at low sewing tension, and could overlock sew perfect stable stitches even at high sewing speed. Type, industrial sewing machine Stitch formation, overlock stitch Mechanical configuration, box bed Max. Sewing speed, 6000 Max. Sewing thickness, 3mm Stitch length, 2mm Power, 250w / 370w Overall dimensions, 480x335x470 Weight, 33kgs Feed mechanism, drop feed Condition, new Stitch length, 3.6mm Stitch width, 4mm Height of presser foot, 5.5-6.0mm Needle type, dcx27 Hook type, standard vertical hook Number of threads, 3-7 Max number of needles, 7 Gross weight, 35kgs Voltage, 220/360 Differential ratio, 0.7-2 Packing size: 480*335*470mm Gross/net weight: 35/33kg Packing ways: standard exportation carton