Device that provides lubricating oil when the sewing machine is running. It is classified into gravity lubrication device; device that relies on self-weight or capillary action to transport and distribute lubricating oil to the parts that need lubrication. Generally, an oil tank is used to transport oil through oil lines, oil pads and oil pipes. Pressurized lubrication device: a device that applies pressure to lubricating oil and transports it through pipelines to various parts that need lubrication. Generally, gears, plungers or centrifugal oil pumps are used. Splash lubrication device: a device that splashes lubricating oil to the parts that need lubrication by the rotation of the transmission parts immersed in lubricating oil when the sewing machine is running. Other related terms presser foot lifting height presser foot lifting height The distance between the presser foot bottom plane and the needle plate plane after the presser foot is locked. Stitch length adjustment device In sewing machines, a device specifically used to adjust the stitch length. Material trimming device Material trimming device A device that cuts off the sewing material during sewing. There is a device for cutting off the waste edge of the sewing material in overlock machines and flat-bed sewing machines with knives. There is a device for cutting off the waste leather material in sewing machines for sewing leather. Automatic sewing machines have devices for cutting thread tape, decorative tape and other sewing materials. (From Sina iAsk Open Dictionary) Punching device Punching device A device for punching holes in sewing materials during sewing. A device for punching buttonholes in a buttonhole machine. A device for making pattern holes in an embroidery machine. Bobbin winder A device for winding the thread from the ball of thread onto the shuttle. The built-in winding device is installed in the body of the sewing machine. The external winding device is installed on the table of the sewing machine. Thread tension mechanisms A device that applies clamping force to the thread to allow the thread to form a stitch smoothly under a certain tension. This device can be adjusted as needed.
