Shuttle hook sewing machine like GA243, GA441, GA204-370 etc. Shuttle hook can sew more hard and thick material. It have a bigger strength for go through the material. Can sew more than 15mm thick leather. Max 29mm more thick like GA733 machine. Because its special structure, even thought it can sew very strong and thick material, but working speed is lower. For example 600rpm, 800rpm, 1000rpm.
The material of lock stitch sewing machine needles is another factor to consider. Most needles are made from high-quality steel, often coated with chrome or nickel to enhance durability and reduce friction. These coatings enable smoother sewing, especially when working with dense or heavy materials. Using the right needle material can significantly impact the lifespan of both the needle and the sewing machine, as well as reduce the likelihood of needle breakage, hence preventing potentially costly machine repairs.
Historically, sewing machines were limited to lightweight materials and delicate fabrics. However, as the demand for stronger packaging increased, the technology behind sewing machines adapted accordingly. Woven sack bag sewing machines have evolved to handle thicker, heavier materials, ensuring robust seam integrity capable of withstanding the rigors of transport and storage.
If you’re interested in purchasing a self-threading sewing machine, several avenues are available to explore.