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45ton Gap Frame Variable Stroke Punching Press

JH2-45L c frame variable stroke press machine is suitable for one press with different tools. Stroke length is adjustable through the mechanism installed in front of the crankshaft. This stroke adjustable press standard equips with dry type pneumatic clutch, hydraulic overload protection, automatic lubrication system and PLC central control system.
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  • JH21L

  • WORLD

Main features of 45ton variable stroke press

-45ton punching capacity

-dry type pneumatic clutch

-automatic grease lubrication

-7 shifts stroke lengths adjustable, suitable for different type tools

-standard equip with safety light barriers and frequency inverter


variable stroke press clutch

press stroke adjusting system

Power press stroke length adjusting mechanism

The mechanism is installed in front of the crankshaft, adjustable by manual. Motorized adjustment is optional. There is a hole for operator to check the right stroke length position.

A knob for adjusting the stroke length is located on the press console. When adjusting, the pneumatic cylinder will drive the adjusting shaft out. Use a spanner to adjust the shaft to the wanted position. Turn back the stroke adjusting knob and the shaft will return back to original position.

Technical parameters of variable stroke press


JH21-25L JH21-45L
Capacity kN 250 450
Nominal Stroke mm 3 4
Slide Stroke mm 10-110 20-120
SPM Fixed min-1 100 80
Variable min-1 80-120 70-90
Max. Die Height mm 250 270
Die Height Adjustment mm 50 60
Throat Depth mm 210 230
Between Columns mm 450 550
Bolster LR mm 700 810
FB mm 400 440
Thk mm 80 110
Bolster Opening  mm φ170×20 φ180×30
(Up Hole Dia.×Dpth×Low Hole Dia.) ×φ150 ×φ160
Slide Area LR mm 360 600
FB mm 300 360
Shank Hole Dia. mm φ40 φ40
Dpth mm 60 60
Main Motor Power kW 4 5.5
Dimensions FB mm 1500 1610
LR mm 950 1170
H mm 2650 2850
Net Weight kg 3100 4350


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