The J21 Series Open Type Pneumatic Power Press is a high-efficiency metal stamping and forming machine designed for punching, blanking, bending, embossing, and sheet metal processing applications. Featuring a rigid welded steel frame structure with stress-relief heat treatment, the machine delivers excellent precision, stable performance, and long-term durability.
This pneumatic power press adopts an advanced pneumatic clutch and brake system, enabling sensitive operation, fast response, low noise, and enhanced operational safety. The machine supports inching, single stroke, and continuous operation modes, making it suitable for various metal forming processes in industrial manufacturing.
Equipped with a rectangular guide rail structure, high-strength crankshaft, automatic lubrication system, and optional overload protection device, the J21 series provides reliable and efficient production performance for automotive parts, hardware products, electrical components, kitchenware, and metal fabrication industries.
The adjustable stroke and stroke speed design allow the machine to adapt to different production requirements, improving flexibility and manufacturing efficiency.
|
Specifications and models |
Unit |
JH21-110 |
JH21-125 |
JH21-160 |
JH21-200 |
JH21-250 |
JH21-315 |
JH21-400 |
|
Nominal pressure |
kn |
1100 |
1250 |
1600 |
2000 |
2500 |
3150 |
4000 |
|
Nominal force trip |
mm |
5 |
5 |
6 |
6 |
8 |
8 |
8 |
|
Slider stroke |
mm |
180 |
180 |
180 |
200 |
250 |
250 |
250 |
|
Number of trips |
s.p.m |
45 |
45 |
45 |
40 |
35 |
30 |
35 |
|
Maximum height of mould |
mm |
350 |
350 |
400 |
450 |
450 |
500 |
500 |
|
Adjustment of mounting height |
mm |
90 |
90 |
100 |
110 |
110 |
120 |
120 |
|
Distance from slider center to fuselage |
mm |
350 |
350 |
390 |
430 |
430 |
470 |
470 |
|
Slider stroke of ejector rod |
mm |
50 |
50 |
60 |
80 |
70 |
70 |
70 |
|
Column spacing |
mm |
700 |
700 |
810 |
960 |
1100 |
1040 |
1020 |
|
Size of worktable (F.B × L.R) |
mm |
680×1070 |
680×1070 |
760×1170 |
760×1400 |
800×1400 |
920×1550 |
920×1550 |
|
Size of worktable hole |
mm |
φ160 |
φ160 |
φ220 |
φ250 |
φ360 |
φ360 |
φ300 |
|
Thickness of worktable plate |
mm |
150 |
150 |
150 |
160 |
170 |
170 |
180 |
|
Slider bottom dimension (F.B × L.R) |
mm |
520×620 |
520×620 |
580×700 |
650×880 |
650×880 |
730×1020 |
730×1020 |
|
Size of die shank hole (F.B × L.R) |
mm |
φ70×85 |
φ70×85 |
φ65×95 |
φ65×90 |
φ65×90 |
φ70×90 |
φ70×90 |
|
Air pressure |
mpa |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
|
Air cushion push out force |
kn |
60 |
60 |
80 |
110 |
140 |
140 |
140 |
|
Air cushion travel |
mm |
90 |
90 |
90 |
125 |
125 |
125 |
125 |
|
Main motor power |
kw |
11 |
11 |
15 |
18.5 |
22 |
30 |
30 |
|
External dimensions (F.B × L.R) |
mm |
1790×1300 |
1790×1300 |
2265×1420 |
2480×1645 |
2700×1700 |
2700×1700 |
2700×1795 |
|
Press height |
mm |
3250 |
3350 |
3380 |
3520 |
4135 |
4135 |
4235 |
|
Weight of the whole machine |
kg |
9550 |
10500 |
14500 |
19000 |
26500 |
28600 |
34000 |
The J21 series is widely used in metal sheet processing and stamping industries.

1. What materials can the J21 press machine process?
It can process carbon steel, stainless steel, aluminum, copper, galvanized sheet, and other metal materials.
2. What operations can this power press perform?
The machine supports punching, blanking, bending, embossing, forming, and stamping operations.
3. Is the machine suitable for continuous production?
Yes. The machine supports continuous automatic operation with stable performance and high efficiency.
4. What safety features are included?
Optional safety features include hydraulic overload protection, emergency stop, and photoelectric safety devices.
5. Can the stroke speed be adjusted?
Yes. The machine allows adjustable stroke and operating speed based on production needs.
6. Does the machine support automatic production lines?
Yes. PLC control and automation interfaces can be configured for automated stamping lines.
7. What type of lubrication system does it use?
The machine adopts centralized automatic lubrication for key transmission components.
8. What are the advantages of pneumatic clutch operation?
Pneumatic clutch systems provide smoother operation, faster response, lower noise, and higher reliability compared with traditional mechanical systems.