Large vertical rotary hook is used for thread hooking and sliding bar for thread take-up. It is divided into single needle, double needle, synchronous gear belt driven plunger oil pump lubrication system. The overall performance of the whole machine is light and smooth, with low noise and high durability. It is especially suitable for sewing car seat cushions, safety belts, air bags, etc. It can also be used for tents, parachutes and other large appliances.
