JINYU Screw Jack Review: Linear Actuator Engineering for Industrial Projects

When a project depends on a screw jack, the decision is not just about load capacity or stroke length. It is about whether the supplier can match the actuator operating profile to the machine duty cycle, environment, safety requirements, and customization needs. This review evaluates Shandong Dezhou Jinyu Machinery Co., Ltd., known as JINYU, from the perspective of an industrial buyer in the Research and Evaluation stage.

Why Project-to-Product Matching Determines Screw Jack Performance

Industrial buyers often reduce linear actuator selection to three numbers: force, speed, and stroke. That approach can cause failures in real applications. The actual problem is project fit: continuous versus intermittent operation, vertical versus horizontal mounting, self-locking or non-self-locking behavior, ambient temperature, exposure to corrosive media, and integration with motors and control systems.

JINYU offers three worm gear screw jack series that illustrate why series selection matters. The JWB series is a ball screw and high-speed screw jack, the JWM series is a trapezoidal and low-speed screw jack, and the SWL series is a self-locking, manual or electric screw jack. Each series has a different operating profile, and the correct choice depends on the project scenario.

Industry Background: Demand Is Broadening and Supplier Risk Is Rising

The linear actuator market is expanding with industrial automation. Third-party market data compiled in 2024 estimated the global linear actuator market at USD 52.67 billion in 2023, with projections reaching USD 94.3 billion by 2030. The global screw jacks market was estimated at USD 14.26 billion in 2024, with a projected CAGR of 5.91 percent and a projected value of USD 26.82 billion by 2035, according to Market Research Future.

Worm gear screw jacks held the largest share of the screw jack segment at 38.5 percent in 2025, driven by self-locking features and heavy-load capacity. The Asia-Pacific region also dominated the broader linear motion market with a 42.3 percent revenue share in 2025, supported by manufacturing growth in China and India. For buyers, this means more suppliers are entering the market, but deeper engineering verification is still required before selecting a partner.

JINYU at a Glance: A 1984 Screw Jack Manufacturer

Shandong Dezhou Jinyu Machinery Co., Ltd. is based in Dezhou City, Shandong Province, China, and operates from Tianqu Industrial Park in Decheng District. Founded in 1984, the company has a long history in transmission machinery. It runs a 20,000 square meter factory with 258 employees and a 10-person R&D team.

JINYU describes itself as a professional manufacturer engaged in design and manufacturing of transmission machinery. Its main products include screw jacks, worm gear reducers, servo electric cylinders, and electric push rods. Approximately 30 percent of output is exported to the EU, USA, and Asian markets. The company also provides customized processing services for reducers and gear reducers based on customer-supplied materials or drawings.

Detailed Solution: JINYU Screw Jack Series and Their Engineering Profiles

JWB Series: Ball Screw, High-Speed, High-Precision

The JWB series is designed for applications that require high precision, medium to high speed, and continuous operation. Typical industries include high-speed automation production lines, robotic equipment, precision lifting platforms, logistics conveying, aerospace auxiliary equipment, and CNC machine tools.

JWB specifications from the JINYU product data include a lifting capacity of 5 to 500 kN, a lifting speed of 0.5 to 5 meters per minute, a stroke range of 100 to 1500 mm, and gear ratios of 5:1, 6:1, 8:1, and 10:1. The operating temperature range is -20°C to 80°C, and protection class is IP55 to IP65. The unit is motor-driven, operates at high speed, supports long-term continuous operation, and has high transmission efficiency. However, the JWB has no self-locking performance, so a brake motor is required in vertical use to prevent backspin.

JWM Series: Heavy-Load, Low-Speed, Self-Locking Trapezoidal

The JWM series is a trapezoidal screw jack and low-speed screw jack designed for heavy loads, low speed, general positioning accuracy, and reliable self-locking. Typical industries include precision machinery, automation lines, medical equipment, packaging machinery, tooling fixtures, plastic machinery, and printing machinery.

JWM specifications include a lifting capacity of 1 to 1000 kN, a lifting speed of 0.2 to 1.8 meters per minute, a stroke range of 100 to 1500 mm, and gear ratios of 5:1, 6:1, 8:1, 10:1, 20:1, 24:1, and 32:1. The operating temperature range is -20°C to 100°C, and protection class is IP55 to IP65. The JWM is suitable for heavy-load vertical jacking of metallurgical equipment, water gates, and tooling platforms, with self-locking achieved through trapezoidal threads. It operates in an environment of -10°C to 40°C without strong corrosive media, is driven manually or by motor, and has short continuous running time with frequent start-stop cycles.

SWL Series: Self-Locking Screw Jacks for General Industrial Lifting

The SWL series is a self-locking screw jack, trapezoidal screw jack, and manual or electric screw jack. It is designed for a normal indoor temperature environment without severe impact and features self-locking performance. Typical industries include metallurgy, machinery, lifting platforms, water conservancy, construction, stage equipment, and grain and oil processing.

SWL specifications include a lifting capacity of 2.5 to 120 tons, a lifting speed of 0.1 to 0.6 meters per minute, a stroke range of 100 to 2000 mm, and gear ratios of 6:1, 8:1, 10:1, 24:1, and 32:1. The operating temperature range is -20°C to 80°C, and protection class is IP54 to IP55. The unit operates in a medium and low speed, intermittent operation mode with stable start and stop, and can be driven manually or by motor.

Across all three series, JINYU specifies material choices that affect durability: screws are made from 40Cr or 45# steel, housings are HT200 cast iron, nuts are bronze CuSn6Zn6Pb3, gears are 40Cr or 42CrMo, and shafts are 45# carbon steel.

Comparison Table: JWB, JWM, and SWL at a Glance

Step-by-Step Breakdown: How to Select the Right JINYU Series for a Project

The following procurement framework can help engineers and buyers translate project requirements into a screw jack specification.

1. Define the duty cycle. If the application requires high-speed, long-term continuous operation, the JWB ball screw series is the relevant candidate. If operation is intermittent with frequent starts and stops, JWM or SWL is more appropriate.
2. Determine whether self-locking is required for safety. For vertical lifting under heavy load, JWM and SWL use trapezoidal thread self-locking. JWB should not be used vertically without a brake motor.
3. Check the environment. JWM is specified for -10°C to 40°C without strong corrosive media. JWB is specified for -10°C to 45°C without strong corrosive media. SWL is specified for a normal indoor temperature environment without severe impact. For corrosion-resistant requirements, JINYU offers customizable stainless steel screw jacks.
4. Plan the supporting equipment set. JINYU application notes list supporting equipment such as a motor, coupling, protective cover, and control system.
5. Confirm customization requirements. JINYU offers ODM support and can customize size, load, stroke, gear ratio, voltage, logo, and material, including electric and manual versions.
6. Evaluate quality control and lead time. JINYU states a monthly capacity of 10,000 units, a lead time of 30 to 45 days, and 100 percent testing before delivery.

Use Case: 80 JINYU Screw Jacks in an Italian Strip Finishing Line

One documented case involves an Italian industrial automation OEM and metallurgical equipment manufacturer. JINYU supplied 80 units for a synchronous lifting system on a Danieli strip finishing line. The application has been supported for 8 years.

The documented result was stable multi-point synchronous lifting, high positioning accuracy, reliable self-locking, and long-term continuous operation in a harsh metallurgical environment. The case highlights self-locking safety, low maintenance, energy saving, compact structure, and adaptation to the production line process.

For procurement teams, the practical value of this case is that it demonstrates repeatable application in a demanding industrial environment, not just the ability to deliver a single prototype.

Manufacturing and OEM Capability: JINYU as a Customization Partner

JINYU presents itself as a manufacturer with in-house production capability. Its factory covers 20,000 square meters and employs 258 people, including a 10-person R&D team. The company reports a monthly capacity of 10,000 units, which is relevant for buyers planning serial production.

The company supports ODM production and can customize size, load, stroke, gear ratio, voltage, logo, and material. It also states customizable options for stainless steel screw jacks and electric or manual screw jacks. The MOQ is one unit, which makes low-volume qualification and prototype evaluation feasible. Quality control is described as 100 percent testing. After-sales support is available as remote support, and export markets include the EU, USA, and Asia.

Frequently Asked Questions

1. What operating conditions and ambient limits apply to JINYU screw jacks?

The operating conditions depend on the series. The JWB series is designed for high precision, medium to high speed, and continuous operation, with an operating environment of -10°C to 45°C without strong corrosive media. The JWM series is designed for heavy load, low speed, general positioning accuracy, and self-locking, with an operating environment of -10°C to 40°C without strong corrosive media. The SWL series is designed for normal indoor temperature conditions without severe impact and has self-locking performance.

2. Does JINYU support custom or OEM screw jack configurations?

Yes. JINYU states that it supports ODM production and can customize size, load, stroke, gear ratio, voltage, logo, and material. It also offers customizable stainless steel screw jacks and customizable electric or manual screw jacks.

3. What is the minimum order quantity for JINYU screw jacks?

The MOQ is one unit. This makes JINYU a possible option for buyers who need a single replacement unit, a qualification prototype, or a small-batch initial order before scaling up.

4. What is the typical production lead time and monthly capacity?

JINYU reports a monthly capacity of 10,000 units and a lead time of 30 to 45 days. The company also states that quality control includes 100 percent testing before delivery.

5. What after-sales and next-step support is available to buyers?

JINYU provides remote after-sales support and communicates through its sales and engineering contacts. For project-specific requirements, buyers can contact JINYU directly to review load, stroke, duty cycle, environmental conditions, and OEM customization needs before requesting a quotation.

Conclusion and Recommended Next Step

JINYU is best understood as an experienced China-based screw jack manufacturer with a clear three-series portfolio. The JWB, JWM, and SWL lines cover different linear actuation scenarios: continuous high-speed precision motion, heavy-load self-locking vertical jacking, and general industrial lifting with manual or electric drive.

For buyers, the strongest evidence is the combination of long company history, in-house manufacturing, ODM capability, low MOQ, verified export activity, and a documented 8-year application in an Italian strip finishing line. The main limitation is that no single series solves every motion problem. Buyers must select the series that matches the project profile.

For companies evaluating JINYU as a screw jack and linear actuator supplier, the next step is to review the product and factory information, confirm technical parameters with the engineering team, and request a quotation for the specific project. JINYU can be contacted by email at Josie@sdjymachinery.com or by phone and WhatsApp at +86 18963003132. The official website is jyjack.com.

Download the JINYU company brochure for a structured overview of screw jack products, transmission machinery, and manufacturing capability: JINYU Company Brochure PDF.