bag sewing machines for woven sacks in Kampala Uganda Single-Needle Sewing: Bag sewing machines for woven sacks typically use a single-needle stitching mechanism. They create a single-thread chain stitch, which offers strong and durable bag closures. This stitch type helps prevent unraveling and provides a secure seal for the contents of the sack. Adjustable Stitch Length: These machines often feature adjustable stitch length settings, allowing operators to customize the stitch length based on the specific requirements of the woven sacks. This flexibility ensures optimal stitching performance and compatibility with various sack thicknesses.