This machine is used to the connecting rod to select the line, big rotating hook self-lubrication system, about the dispostiton the feed mechanism and presses the foot to promote the organization in turn, forms 301 marks. Seam thick ability strong, level seam performance good, uses the self-lubrication installment, the low noise, the long service life, is suitable for the leather, the imitation leather, the canvas, the cushion, the sofa, case and bag products. Synchronizes the feed of upper and lower layers of material by top and bottom feeding mechanism while sewing inflationary materials and latently movable materials of medium and heavy weight. Decrease bobbin change frequency and improve sewing machine efficiency by using large rotary hook, prolongs service life by adopting automatic lubricating system.
