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JH21 C Frame Single Crank Power Press

The JH21 C-frame press, as the most widely utilized sheet metal processing solution, is specifically designed for comprehensive operations including stamping, punching, cutting, bending, trimming, and blanking, with available press tonnages ranging from 25 to 400 tons. This single-crank press features a standard configuration comprising a PLC control system, touchscreen HMI interface, wet-type pneumatic clutch and brake mechanism, safety solenoid valve, hydraulic overload protection system, automatic grease lubrication pump, and slide balance cylinders. Optional enhancements include safety light barriers, frequency inverter for adjustable stroke speeds, piston-type die cushion, quick-change die clamps, tonnage monitoring system, and safety die blocks. With the integration of a coil sheet roller feeder, this press can be configured as an automatic production unit, and for full automation, multiple JH21 presses can be integrated with transfer systems such as robotic manipulators to create complete automated press lines.
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  • JH21

  • WORLD

power press wet clutch

World patent wet type pneumatic clutch and brake for power press machine

Engineered for demanding industrial applications, this WORLD-patented wet pneumatic clutch and brake assembly integrates high quality friction discs and seals with precision-machined flywheel components. The oil immersion lubrication system significantly enhances heat dissipation and component longevity, while mandatory thermal and balance testing ensure operational reliability. Key advantages over dry-clutch systems include quieter operation, reduced maintenance frequency, and cost-effective servicing—critical for high-volume production of household appliance parts that require exceptional cleanliness control.

PLC for pneumatic press control

Programmable logistic control system is standard equip to all WORLD brand automatic power presses. Schneider, Omron, Panasonic are all available. The PLC-managed automatic lubrication system allows operators to customize lubrication schedules through the HMI touchscreen. With inch, single, and continuous stroke modes, the press adapts to diverse production requirements. Physical emergency stop buttons and comprehensive HMI monitoring provide fail-safe operation and real-time status visibility.

Hydraulic overload protection system for pneumatic press machine

Engineered with fail-safe protection, the World press features a hydraulic overload protection system that replaces traditional mechanical shear plates with advanced sensitivity and dependability. When detecting abnormal pressure conditions, the system instantaneously redirects hydraulic oil from the bowl to the relief pump tank while sending an emergency stop command to the press. This dual action protects critical tooling and pneumatic systems. Operators can reset the system via the control panel switch, which repressurizes the ram for uninterrupted production cycles.

c type press compact structure

Compact stucture of the C type press

1. Cross located crankshaft

2. Motor and clutch are on the back

3. Two slide balance cylinders

4. C frame steel welded body, annealing treatment

5. Overload pump, grease pump and pneumatic system are all in the back

High precision rectangular type slide guides for the gap frame press

Our precision-engineered six-face ram slide system features an extended rectangular profile with bronze liners permanently affixed to the press body. This innovative design provides both enhanced positioning accuracy and extended surface longevity. The guide gap adjustment system utilizes front-mounted bolts for precise calibration. All ram components are cast using advanced foundry techniques at our global manufacturing facilities, followed by CNC milling center operations to ensure micron-level tolerances. The fully automatic grease lubrication system maintains optimal lubricant film thickness, resulting in vibration-free operation, exceptional reliability, and remarkably low acoustic output.

ball screw of power press

Con rod with ball screw for power press machines

1. Casting con rod, forging steel ball scres

2. Ball screw nitrogen treatment to improve the harness

3. Oil lubrication inside con rod

4. Motorized ram height adjustment

5. Ram adjustment precision 0.1mm with die height indicator



Dimensions of JH21 Press Machines


single crank press dimensions


Specifications List of Presses


ITEM

CODE

UNIT

JH21-25

JH21-45

JH21-60

JH21-80

JH21-100

JH21-125

Nominal Capacity

Pe

KN

250

450

600

800

1000

1250

Slide Stroke Length

S

mm

80

120

140

160

160

180

Rated Tonnage Point


mm

3

4

4

5

5

6

Stroke Speeds

Fixed


spm

100

80

70

60

55

50

Variable (optional)


spm

60-120

50-95

45-85

40-75

35-65

35-60

Max. Die Shut Height

H2

mm

250

270

300

320

335

350

Slide Adjustment

t

mm

50

60

70

80

90

90

Throat Depth

C1

mm

210

225

270

310

330

350

Distance Between Uprights

d1

mm

470

525

560

580

670

696

Slide Bottom Size

L-R

a

mm

360

400

480

540

620

620

F-B

b

mm

250

340

400

460

520

520

Shank Hole Size

Diameter

d

mm

50

50

50

50

N/A

N/A

Depth

I

mm

50

60

70

70

N/A

N/A

Table Size

L-R

C

mm

720

825

930

950

1060

1100

F-B

D

mm

400

440

520

600

640

680

Thickness

H3

mm

80

110

130

140

145

155

Table Hole Diameter

¢

mm

150

150

150

180

180

200

Bolster Surface Height (w/o pads)

H1

mm

750

775

800

845

850

850

Overall Dimensions

F-B

A

mm

1500

1540

1585

1765

2000

2040

L-R

B

mm

945

1075

1200

1200

1300

1320

Height

H

mm

2090

2365

2470

2675

2960

2980

Motor Power


KW

3

5.5

5.5

7.5

7.5

11

Air Pressure


Mpa

0.5

0.5

0.5

0.5

0.5

0.5

Weight (approximate)


kg

2300

3350

4800

5550

7500

8700

ITEM

CODE

UNIT

JH21-160

JH21-200

JH21-250

JH21-315

JH21-400

Nominal Capacity

Pe

KN

1600

2000

2500

3150

4000

Slide Stroke Length

S

mm

200

200

220

220

250

Rated Tonnage Point


mm

6

6

6.5

7

8

Stroke Speeds

Fixed


spm

45

45

30

30

30

Variable (optional)


spm

30-55

30-55

20-35

20-35

20-35

Max. Die Shut Height

H2

mm

400

450

500

500

550

Slide Adjustment

t

mm

100

110

120

120

120

Throat Depth

C1

mm

400

430

450

450

450

Distance Between Uprights

d1

mm

696

910

980

980

1050

Slide Bottom Size

L-R

a

mm

700

880

900

900

1020

F-B

b

mm

580

650

700

700

750

Table Size

L-R

C

mm

1175

1390

1500

1540

1700

F-B

D

mm

760

840

880

880

880

Thickness

H3

mm

165

180

190

190

210

Table Hole Diameter

¢

mm

220

240

240

240

240

Bolster Surface Height (w/o pads)

H1

mm

900

1000

1000

1000

1100

Overall Dimensions

F-B

A

mm

2305

2600

2660

2720

2850

L-R

B

mm

1420

1540

1640

1680

1750

Height

H

mm

3210

3800

3850

3850

4585

Motor Power


KW

15

18.5

22

30

37

Air Pressure


Mpa

0.5

0.5

0.5

0.5

0.5

Weight (approximate)


kg

12200

18500

22800

25600

29100

We provide a lot of optional accessories for press such as following items. Customer can buy all the accessories as a package order and we provide in time delivery and same warranty.

press light barriers

Light Barriers for Safety


press inverter

Inverter for Adjustable Stroke Speeds


press die cushion

Piston Type Die Cushion

press roller feeder

NC Roller Feeder


press QDC system

Die Quick Change Device


press tonnage monitor

Tonnage Monitor


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