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J21 press machine

Item No.: 00443
Industrial open type pneumatic press featuring adjustable stroke, automatic lubrication, and high-rigidity welded structure for metal fabrication.
Description
Description

Product Overview

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.

Features & Benefits

High-Rigidity Welded Steel Frame

  • Steel plate welded body with tempering treatment
  • Excellent rigidity and deformation resistance
  • Stable precision during continuous operation

Pneumatic Clutch & Brake System

  • Dry pneumatic friction clutch and brake
  • Sensitive response and reliable operation
  • Lower noise and reduced impact during operation

Adjustable Stroke & Speed

  • Stroke and stroke frequency adjustable
  • Suitable for multiple stamping applications
  • Improves production flexibility

High-Strength Crankshaft System

  • Crankshaft undergoes quenching and grinding treatment
  • Smooth transmission and long service life
  • Stable high-speed operation

Precision Rectangular Guide Rail

  • High guiding accuracy and strong stability
  • Reduces slide movement deviation
  • Improves stamping precision

Pneumatic Balancing Device

  • Balances slide and upper die weight
  • Reduces vibration and impact noise
  • Minimizes guide rail clearance

PLC Electrical Control System

  • Supports inching, single stroke, continuous operation, and emergency stop
  • Flexible and safe operation
  • Optional PLC centralized control available

Automatic Lubrication System

  • Ensures sufficient lubrication for key components
  • Reduces wear and maintenance costs
  • Improves machine lifespan

Optional Safety Configurations

  • Hydraulic overload protection device
  • Photoelectric safety protection system
  • Variable frequency speed control system

Product Parameters

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

Product Application

The J21 series is widely used in metal sheet processing and stamping industries.

Typical Applications

  • Metal punching
  • Sheet metal blanking
  • Bending and forming
  • Embossing and coining
  • Hardware stamping
  • Metal component shaping
  • Appliance part production
  • Automotive metal parts processing

Applicable Industries

  • Automotive manufacturing
  • Hardware processing
  • Electrical appliance industry
  • Kitchenware manufacturing
  • Metal fabrication workshops
  • Machinery manufacturing
  • Construction hardware production
  • Industrial parts stamping factories

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FAQ

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.

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