1. Buy Industrial sewing machine parts For sale tell you that the selection and installation of its needles are generally good for sewing thin, brittle, Small (fine) needles should be used for dense sewing materials, while large (thick) needles should be used for thick, soft and sparse sewing materials.

Buy Industrial sewing machine parts For sale tell you that Thick needles are used for sewing thin materials. Due to the high friction between the needle and the sewing material, when the needle rises, the sewing material will rise randomly in the presser foot groove, which delays the thread loop. If a thin needle is used when sewing thick materials, it will cause the needle to bend or break.
Buy Industrial sewing machine parts For sale tell you that during high-speed sewing, the severe friction between the needle and the sewing material will cause the needle temperature to be too high, and in serious cases, it will form a melting hole in the chemical fiber fabric or cause the chemical fiber suture to melt, and the needle hole will be too high Increased thread resistance will worsen the forming condition of the upper thread and cause skipped stitches or broken threads. Therefore, special selection and cooling of the machine needle should be carried out.
Buy Industrial sewing machine parts For sale tell you that when sewing chemical fiber fabrics with a low melting point at high speed, double-section needles or high-speed machine needles can be used. The thick upper section of the double-section needle can increase the stiffness of the needle, and the lower section can be reduced. The friction between the needle and the sewing material reduces the needle temperature; the size of the needle tip and both sides of the pinhole of the high-speed machine needle is 5% to 7% thicker than the diameter of the needle bar, which can reduce the heat generated by the friction between the needle bar and the sewing material.
Buy Industrial sewing machine parts For sale tell you that adding silicone oil to the suture and air cooling can effectively reduce the needle temperature. Silicone oil is colorless, transparent, and easy to volatilize. It can take away part of the heat from the needle during high-speed sewing. When installing the needle, cut off the power supply of the motor, turn the upper wheel to make the needle bar rise to the position, unscrew the needle screw, turn the long slot of the needle towards the left side of the operator, and then insert the needle handle into the needle hole at the lower part of the needle bar until it touches the top of the needle bar hole, and then tighten the needle set screw.