FIBC bag jumbo bag big bag sewing machine This sewing machine have full sealed oil pump for automatic oiling lubrication. The maximum sewing speed can reach 1600 RPM. Normally working speed 1200-1400 RPM. It is develop from NS7800 and GSC-2602TD, same function and operation method, but with higher speed and auto lubrication, highly improve the working efficiency. Use big rotary hook. Working Area get bigger reach: 420X210mm. And this sewing machine have some additional function: Auto thickness identify function. When sewing Corner or sudden thickness place, the sewing machine will auto release the thread holder, so it have a better climbing ability. And auto speed lower when free sewing function, this function is very good for new workers, when use hand to presser foot lift, the working speed will get lower for free sewing. It is suitable for more than 3 tons jumbo bag sewing. Application: FIBC bag (Jumbo bag); lifting belts; Slings; Tensioner; tents etc for heavy duty uses.