This part of JB/T 5201 specifies the technical requirements for the design, manufacturing, inspection, packaging and transportation of thread rolling machines. This part is applicable to machines with a maximum rolling force of 16kN ~ 1250kN, two spindles that rotate synchronously in the same direction and move relative to each other in the horizontal direction. Thread rolling machine. It is also suitable for thread rolling machines with a maximum rolling force of 16kN to 315kN and three spindles that rotate synchronously in the same direction and move relative to each other.