Key words: quick return press, punch machine, punch press, punching press, punching machine, sheet punching machine, mechanical punching machine JZ21F series open-type quick return press Main properties of products: The presses of this series employ the advanced multiple-bar linkage, which is characterized by slow down-stroke, approximate constant-velocity working-stroke and quick return-stroke of the slide. They will greatly reduce the noise, the vibration, and the breaking of blank. Terefore the use of this series of press will not only lengthen the life of die but also improve the productivit largely. They are especially suitable for drawing procedures. Other properties: 1. High rigidity: steel-welded grame with less deformation to ensure long die durability. 2. High strength: Long service life. Important parts adopt high quality material with heat treatment. 3. High accuracy: Slide employs 6-side rectangle guide which guides well and precisely. 4. High safety: A variety of steps have been taken to ensure the safety of operation. When the press is in the overload condition, the dydraulic overload protector sensitively prevents the machine and the die from being damaged. 5. High reliability: The adoption of PLC, high quality electrical and sealed parts ensure the reliability of machine. 6. Low noise: Pneumatic wet-type friction clutch-brake is applied. Main drive gear, immersed in a closed oil tank, runs smoothly with low noise. Specifications of Products: No.DescriptionsUnitJZ21F-110JZ21F-150JZ21F-200JZ21F-2501Nominal CapacitykN11001500200025002Nominal Strokemm56673Stroke of Slidemm1802002502504Strokes Per Minutespm504535355Max. Die Heightmm3504004505006Die Height Adjustmentmm901001101107Throat Depthmm3503904304508Bolster SizeR-Lmm1070117014001500F-Bmm6807608408609Bolster HoleDia.mm15018025026010Slide Bottom SizeR-Lmm620700880950F-Bmm52058065068011Shank Hole SizeDia.mm50656565Depthmm758010510512Distance Between Columnsmm69076092095013Motor Type Y160L-6 Y180L-6 Y180M-4 Y180L-4Powerkw111518.522Rev.rpm9709701470147014Air Pressure Mpa0.50.50.50.615Overall SizeR-Lmm1400150017501980F-Bmm2460270028003020Heightmm3095338038704200Optional attachments of the products: 1. reflector type optoelectronic safety device 2. automatic feeder 3. quick die changing equipment 4. air die cushion 5. power take-off shaft for automatic feeder 6. air ejector 7. antivibration cushion