- This machine adopts a connecting rod type feeding mechanism stable operation small back stitch error uniform stitch and beautiful appearance. It is suitable for sewing all kinds of thin and medium-thick material clothing fabrics etc. in clothing knitting and other industries Specification: - Model: SM 6-9 - Name: Thick material lockstitch sewing machine - Maximum speed: 3000S.P.M - Needle used: 1 needle type: DP*5 No. 17 - Maximum stitch distance: 7mm(0.27 in) - Presser foot stroke: manual 6mm(0.24 in) knee control 13mm (0.5 in) - Use of the rotary hook: 2 times the thread volume of the rotary hook - Lubrication method: oil pump automatic lubrication - Gross weight/net weight: 35KG/29KG - Outer packaging volume: 580*250*530mm (22.83 * 9.84 * 20.87 in) Packing list: - 1 set of winder - One set of single needle two thread rack - 1 set of machine head rubber pad - Knee control module 1 set - Screwdriver 1 set - Support pillar × 1 - Belt × 1 - Oil cans × 2