It's used to roll thread of screw head by means of two screw plates with 2ND accuracy class, it operates under automatic control.

Type	Dia.of thread	Length of thread	Output	Motor power	Weight
	rolling(mm)	rolling(mm)	(pcs/min)	kw	kg
Z25-4	2--4	6--30	90--110	1.1	300
Z25-5	2--5	6--50	80--90	2.2	1000
Z25-6	4--6	6--60	80--90	3	1300