Main characteristics:The fin die includes upper & lower die plates; draw & form station; pierce extrude sub-die, louver sub-die; edge trim station; longitudinal cut sub-die; mechanical feeder station; cut-off station; the fin die and sub-dies are provided with guidepost, guide sleeve, and ball retainer. The pierce extrude sub-die and louver sub-die have the ball support bushings to lengthen the service life of the piercing and louver puncher. The drawing and forming punch, dowel pin and piercing die are all made of ASSAB tool steel, with machining, heat treatment, shaping grinding and polishing. Upper & lower piercing punch & die are made of Japanese material with machining, heat treatment. Upper and lower side slitters, upper and lower slitter, cut-off blades are made of ASSAB88 with milling, heat treatment and grinding. The die plate is made of P20 pre-hardness steel and sub die are made of CrWMn high carbon steel with CNC processing, homogenizing, grinding and assembly. The guide sleeve is made of Japanese bearing steel Gr 15, and all the springs are made of Japanese material. Common use specification:Φ5*19.5*11.2*(6-24)R Φ7*21.0*12.7 or 20.5*12.7*(12-24)RΦ7.94*22.0*19.05*(12-18)R Φ9.52*25.4*22.0 or 25.0*21.65*(12-18)RΦ10.2*20.0*15.5*(12-24)R Φ12.7*31.75*27.5*(6-12)RΦ15.88*38.0*32.91or 38.1*22.2(6-12)RΦ19.4*50.8*38.1*(4-8)RΦ20*34.0*29.5*(6-12)RΦ25*(4-6)R |