特点：
GB4-1型上下复合送料极厚料缝纫机，采用单针摆梭。构成双线锁式线迹，适宜于航空、铁路、汽车、船舶等部门、蓬帆、皮革制品等，工厂缝制油布、帆布、皮革、毛毡等制品如帐篷、露营房、马鞍、集装袋等之用。

采用：升降式送料牙；交替压脚，此结构在任意长度针距下，缝纫滑性，粘性缝料及特长制品时，都能保持上下层不移位，使制品整齐，线迹美观；连杆挑线结构，使主轴转速得以提高，减轻了声响，保证了整车的质量、延长了使用寿命。可先用加大摆梭，增加容线量，减少换线次数，提高工作效率。

                    
         Large thick material machine

         
         Brand: young workers.

         Uses: Container sewing, linen Wong, canvas, leather, tents, saddle and so on.

         Model: GB4-1 large thick material machine.

         Product Synonyms: thick material machine

         Suitable for: container bags, linen Wong, canvas, leather, tents, saddles and other production enterprises

         Uses and characteristics: GB4-1 Sewing Machine Large thick, single-needle shuttle up and down simultaneously feeding to form double-lock line, according to container
     Bag sewing requirements, professional adjustments made for the thick, thick sewing needle does not jump, gap thin material does not wrinkle after manual presser foot to the left
     Partial reinforcement in the pull sewing for the sewing section of packaging products, plus dust, replace the needle position can be effectively sewing the three components. The
     Slot machine system is also used for linen factory wheels, canvas, leather, wool and other products. As early as tents, camping room, saddle and so on. Sewing speed of 800 stitches / min
     Bell (S / Min) needle gauge length 0-12mm 14mm-18mm presser foot to enhance operating room 200 * 420MM Needle type 7 * 200-230--
     250-300 Motor Power 550W1400 / min (sewing machines motor) head weight 78KG needle bar stroke 58MM.