What is the difference between the J58KA electric screw press and the J58ZKA servo direct-drive electric screw press?
2026-07-23
I. Introduction
The J58KA series electric screw press is gradually replacing traditional friction presses and double-disc friction presses. The characteristics of the electric screw press are: energy saving, environmental protection, and controllable blow energy.
In recent years, with the gradual improvement of technology, AYANK has successfully launched the latest generation J58ZKA series direct-drive electric screw press, which will be more energy-efficient, stable, efficient, and controllable than the J58KA series. Next, I will focus on introducing the differences between the two types of electric screw presses.
II. Fundamental Differences in Drive and Transmission
2.1 Working Principle of J58KA Series Electric Screw Press
The J58KA electric screw press uses a motor + gear transmission method to drive the screw rotation:
The motor drives the flywheel to rotate through a gear reduction mechanism
The flywheel stores kinetic energy and converts it into linear motion of the slide block through the screw-nut pair
Blow energy is controlled by the rotational speed of the flywheel
2.2 Working Principle of J58ZKA Series Servo Direct-Drive Electric Screw Press
The servo direct-drive electric screw press uses a low-speed, high-torque permanent magnet synchronous servo motor to directly drive the screw:
The rotor of the servo motor is directly connected to the flywheel/screw, with no intermediate transmission components
Blow energy, stroke, and speed can all be programmed and set
Core difference: The ordinary model is equivalent to the "motor + gearbox" mode; the servo direct-drive is equivalent to the "hub motor" mode — the power source is directly connected to the load, with zero transmission loss.
III. Detailed Comparison Across Six Dimensions
Comparison Dimension
J58KA Electric Screw Press
J58ZKA Servo Direct-Drive Electric Screw Press
Transmission Efficiency
Approximately 70%-85% (mechanical loss from gears/belts)
Above 90% (motor acts directly on the flywheel, no transmission loss)
Blow Energy Accuracy
Relies on switched reluctance or asynchronous motors, larger energy fluctuation
Closed-loop control, energy repeatability accuracy ≤ ±1.5%
Positioning Accuracy
Millimeter level, deviation caused by transmission clearance
Repeat positioning error ≤ 0.01mm
Number of Wear Parts
Belts, gears, bearings need regular replacement
No transmission belts/gears, wear parts greatly reduced
IV. Energy Consumption and Maintenance Cost Comparison
4.1 Energy Consumption Performance
J58KA electric screw: Still consumes electricity during idle and empty stroke, significant waste during frequent start-stop
J58ZKA servo direct-drive: Only consumes electricity at the moment of forging, nearly zero energy consumption during standby, comprehensive energy saving of 20%-35%
Compared with traditional friction presses: Servo direct-drive can save up to 65%-75%
4.2 Maintenance Costs
J58KA electric screw press: Gearbox requires regular oil changes, belts are prone to wear and slipping, wear of transmission components affects equipment accuracy
J58ZKA servo direct-drive electric screw press: Daily maintenance cost can be reduced by 35%-55%, only requiring a small amount of regular lubrication and basic circuit inspection
4.3 Mold Life
Because the J58ZKA servo direct-drive screw press has precise blow energy control and extremely fast bottom dead center speed, the contact time between the mold and the forging is short, extending mold life by 20%-30%
V. Price and Investment Return Analysis
Comparison Item
Ordinary Electric Screw
Initial Procurement Cost
Lower
Total Lifecycle Cost
Maintenance costs accumulate continuously later
Conclusion: Although the initial investment of J58ZKA servo direct-drive is higher, from the perspective of total lifecycle cost, the continuous savings in energy consumption, maintenance, mold life, scrap rate, etc., make the comprehensive payback period usually no more than 2-3 years.
VI. Application Scenarios and Selection Suggestions
6.1 Scenarios for Choosing J58KA Series Electric Screw Press
Forging automation production lines: Flexible production of multiple varieties and small batches, requiring quick die change and program switching
Smart workshops with strict requirements on energy consumption, noise, and mold life
New energy vehicle parts, aerospace precision forgings
6.3 Industry Trend
The J58ZKA series servo direct-drive screw press "overcomes the fault factors of the original transmission links of the J58ZK series electric screw press, ensuring the reliability and stability of the equipment. It is a manifestation of the development of new technology and also the progress of the forging industry. It is the direction of future green and environmentally friendly forging."
VII. Summary and Suggestions
Demand Type
Recommended Model
Large volume standard forgings, limited budget
J58ZK series electric screw press
Precision forgings, expensive molds, automated production lines
J58ZKA series servo direct-drive electric screw press
Key production line of 630 tons and above
Strongly recommend choosing J58ZKA servo direct-drive in one step
VIII. About Us
AYANK is a leading forging equipment manufacturer in China, providing two product lines: J58ZK series electric screw press and J58ZKA series servo direct-drive electric screw press, covering tonnages from 250 tons to 16,000 tons, meeting the forging needs of different customers.
If you have selection questions or need technical solutions, please feel free to contact us for a free consultation!
