Such machinery feature a brand-new design, super-wide working space and easy taking and feeding of sewing materials and can make sewing operations easy and handy. The transmission mechanism adopts the automatic oil-servicing mode by the oil pump so that at the high-speed and low-speed rotation, the machine can get sufficient lubrication. The operation is stable and reliable. The utilization of high-precision imported bevel wheels and vital spare parts has greatly reduced the noise and improved the precision and service life of the machine. The maximum sewing speed has reached 5000 R.P.M. Major spare parts on the rotary parts of the machine head have applied special-type quality steel, so they are endurable and can meet the demand from the long-time high-speed rotation. The stitches produced by such machinery are beautiful. They are applicable to the sewing of garments, including underwear, shirts, Western-style clothes and jeans.