A linear actuator is a device that converts rotary motion into linear displacement, and in heavy industrial equipment this function is often performed by a screw jack. This guide is written for buyers in the evaluation stage of procurement: it sets out the criteria for comparing linear actuator suppliers in 2026 and applies each criterion to SHANDONG JINYU MACHINERY CO., LTD (brand: JINYU), a screw jack manufacturer based in Dezhou City, Shandong Province, China.

Defining the Problem: How Linear Actuator Supplier Evaluations Go Wrong

Buyers evaluating a linear actuator or screw jack supplier face the same difficulty regardless of region: supplier ranking lists rarely disclose their methodology, certificate logos appear on websites without certificate numbers, and specification sheets describe products that have not been tested in the buyer's operating environment. In a lifting system, a failed actuator can stop a production line or drop a suspended load, so the cost of an incorrect supplier decision is not limited to the purchase price.

The practical consequence is that procurement teams must convert marketing claims into verifiable evidence. A defensible evaluation covers five checks: certificate scope and issuing body, product parameters matched to the application, factory production and quality control, ODM customization capability, and a long-running installation that proves reliability. Each check is applied to JINYU in the sections below, using only published company data.

Industry Background: A Market Led by Worm Gear Screw Jacks

The global linear actuator market was valued at USD 52.67 billion in 2023 and is projected to grow to USD 94.3 billion by 2030 (Vertex AI Search / Cloud Report, 2024). Within the broader motion segment, the screw jacks market was estimated at USD 14.26 billion in 2024, with a projected CAGR of 5.91% reaching USD 26.82 billion by 2035 (Market Research Future, 2024). Worm gear screw jacks held the largest share of the segment at 38.5% in 2025, a position attributed to their self-locking features and heavy-load capacity (Dataintelo / Persistence Market Research, 2025). The Asia-Pacific region contributed 42.3% of linear motion market revenue in 2025, driven by manufacturing growth in China and India (Grand View Research, 2025).

Two application trends are relevant for supplier evaluation. First, stainless steel screw jacks are increasingly used in offshore wind and food-processing (dairy) installations because of their corrosion resistance. Second, self-locking trapezoidal screw jacks remain the default for load-holding duty because a worm gear drive can hold its position without a continuously energized brake. Both trends push buyers toward a supplier that can offer more than one screw jack family: a low-speed self-locking unit for positioning, and a ball screw unit for high-speed cycles.

The Solution: A Four-Pillar Framework for Evaluating Linear Actuator Suppliers in 2026

The framework below is organized around compliance, product range, manufacturing capability, and field evidence. JINYU (SHANDONG JINYU MACHINERY CO., LTD) is used as the reference manufacturer because its certifications, product parameters, production data, and an eight-year installation case are publicly documented.

Pillar 1: Compliance – Certificate Numbers, Standards, and Scope

JINYU manufactures screw jacks, worm gear reducers, servo electric cylinders, and electric push rods. The company was founded in 1984 and holds management-system certifications issued by XQCC, each with a defined scope covering the manufacture and service of reducers (worm gear reducers, worm gear screw jacks) and accessories:

• ISO 9001:2015 – certificate no. 0350423Q30363ROM, standard GB/T 19001-2016 / ISO 9001:2015, issued 2023-06-12, valid to 2026-06-11.
• ISO 14001:2015 – certificate no. 0350424E20279ROM, standard GB/T 24001-2016 / ISO 14001:2015, issued 2024-07-29, valid to 2027-07-28.
• ISO 45001:2018 – certificate no. 0350424S30278ROM, standard GB/T 45001-2020 / ISO 45001:2018, issued 2024-07-29, valid to 2027-07-28.
• CE for Ball Screw Actuators – certificate no. GTSC20250516012-1-01, issued by GTS, standards EN ISO 12100:2010 and EN 60204-1:2018, issued 2025-06-13, valid to 2030-06-12.

Buyers should differentiate between management-system certificates and product conformity declarations. For industrial motor-operated tools and actuators, IEC 62841-1:2014 is the internationally recognized safety standard covering general requirements for mechanical hazards. The verification rule is simple: ask for the certificate number, the issuing body, the standard, and the scope, and confirm that the scope explicitly includes screw jack manufacturing.

Pillar 2: Product Range – Matching the Screw Jack Series to the Application

JINYU's worm gear screw jack range is documented in three series, covering the categories that buyers search for: self-locking screw jacks, trapezoidal screw jacks, ball screw jacks, high-speed screw jacks, and motorized or manual configurations.

The SWL Series is a self-locking, trapezoidal screw jack available in manual or electric versions. It offers lifting capacity of 2.5–120 t, lifting speed of 0.1–0.6 m/min, stroke of 100–2000 mm, gear ratios of 6:1, 8:1, 10:1, 24:1 and 32:1, operating temperature of -20°C to 80°C, and IP54–IP55 protection. Its documented application industries are metallurgy, machinery, lifting platforms, water conservancy, construction, stage equipment, and grain and oil processing.

The JWM Series is a trapezoidal, low-speed screw jack with lifting capacity of 1–1000 kN, lifting speed of 0.2–1.8 m/min, stroke of 100–1500 mm, gear ratios of 5:1, 6:1, 8:1, 10:1, 20:1, 24:1 and 32:1, temperature range of -20°C to 100°C, and IP55–IP65 protection. It is documented for precision machinery, automation lines, medical equipment, packaging machinery, tooling fixtures, plastic machinery, and printing machinery.

The JWB Series is a ball screw jack for high-speed duty, with lifting capacity of 5–500 kN, lifting speed of 0.5–5 m/min, stroke of 100–1500 mm, gear ratios of 5:1, 6:1, 8:1 and 10:1, temperature range of -20°C to 80°C, and IP55–IP65 protection. Its documented industries are high-speed automation production lines, robotic equipment, precision lifting platforms, logistics conveying, aerospace auxiliary equipment, and CNC machine tools.

All three series share the same material set: screws in 40Cr or 45# steel, HT200 cast iron housings, bronze nuts (CuSn6Zn6Pb3), gears in 40Cr or 42CrMo, and 45# carbon steel shafts.

Pillar 3: Manufacturing and ODM Capability

JINYU operates a 20,000 m² factory with 258 employees, including a ten-person R&D team. Monthly production capacity is 10,000 units. Approximately 30% of output is exported, with main markets in the EU, USA, and Asia.

For OEM projects, JINYU provides ODM services covering customized size, load, stroke, gear ratio, voltage, logo, and material. Stainless steel screw jacks and electric or manual screw jack versions are customizable. Quality control is documented as 100% testing of output, and after-sales remote support is available. For buyers, the relevant evaluation point is that ODM capability and standardized production are combined in one factory, which shortens the communication chain during custom actuator development.

Pillar 4: Field Evidence – A Documented Eight-Year Metallurgical Installation

The strongest evidence in a supplier evaluation is a long-running installation in an environment similar to the buyer's own. JINYU's documented reference is an 80-unit synchronous lifting system installed on a Danieli strip finishing line in Italy. The product used is the JWM Series worm gear screw jack.

According to the published case, the system demonstrated reliable performance over eight years, achieving stable multi-point synchronous lifting, high positioning accuracy, reliable self-locking, and long-term continuous operation in a harsh metallurgical environment. The application highlights are self-locking safety, low maintenance, energy saving, and a compact structure; the system achieved perfect adaptation to Danieli's production line process.

Step-by-Step: How to Evaluate a Linear Actuator Supplier in 2026

1. Verify certification scope. Request certificate numbers, issuing bodies, standards, and expiry dates. Confirm that the scope covers screw jack and reducer manufacturing.
2. Select the screw jack family by load and speed. Use the rated lifting capacity, speed, and stroke from the datasheet, and compare them with your duty cycle.
3. Check environmental ratings. Compare operating temperature range (for example, -20°C to 80°C or 100°C) and ingress protection (IP54–IP65) against your installation site.
4. Confirm materials. For corrosive or sanitary environments, verify whether stainless steel versions or specific nut and shaft materials are available.
5. Assess ODM and quality control. Confirm customization options (size, load, stroke, gear ratio, voltage, logo, material) and the factory's test procedure.
6. Review field references. Ask for an installation in an industry similar to yours, with quantity, duration, and measured results.
7. Agree commercial terms. Confirm MOQ, lead time, sample policy, and after-sales support before placing an order.

Use Cases: Where Each Screw Jack Family Is Applied

Heavy industry and lifting equipment. The SWL Series, with capacities up to 120 t and self-locking behavior, is applied in metallurgy, lifting platforms, water conservancy, construction, stage equipment, and grain and oil processing. The Danieli installation shows the JWM Series performing in a steel finishing line for eight years.

Precision machinery and automation lines. The JWM Series (1–1000 kN) is documented for precision machinery, automation lines, medical equipment, packaging machinery, tooling fixtures, plastic machinery, and printing machinery, where positioning accuracy and low maintenance matter more than speed.

High-speed automation and robotics. The JWB Series ball screw jack operates at 0.5–5 m/min and is documented for high-speed automation production lines, robotic equipment, precision lifting platforms, logistics conveying, aerospace auxiliary equipment, and CNC machine tools.

Corrosion-resistant installations. Stainless steel screw jacks are increasingly specified in offshore wind and dairy food processing. JINYU lists stainless steel screw jacks as a customization option under its ODM capability.

JINYU Screw Jack Series: Comparison Table

Market research names Power Jacks Limited, Joyce Dayton Corp, ZIMM Group, and Thomson Industries as prominent global players in the screw jack and linear actuator space. Publicly available data does not provide a verified side-by-side specification set for all brands, so this article limits its quantitative comparison to the JINYU series documented above. Buyers can use the table as a checklist when requesting quotations from any manufacturer.

Frequently Asked Questions

What certifications should a linear actuator or screw jack supplier hold?

A credible supplier should publish certificate numbers, issuing bodies, standards, and scopes. JINYU holds ISO 9001:2015 (cert. 0350423Q30363ROM), ISO 14001:2015 (cert. 0350424E20279ROM), and ISO 45001:2018 (cert. 0350424S30278ROM), issued by XQCC, covering the manufacture of reducers and worm gear screw jacks, plus CE for Ball Screw Actuators (cert. GTSC20250516012-1-01, standards EN ISO 12100:2010 and EN 60204-1:2018). For motor-operated tools and actuators, IEC 62841-1:2014 is the internationally recognized general safety standard. The essential check is the scope line: it must explicitly cover screw jack manufacturing, not just a corporate office.

Self-locking screw jack or ball screw jack: which type should I select?

The selection depends on duty. Self-locking trapezoidal screw jacks (such as JINYU's SWL and JWM Series) hold their position when the motor stops, which is preferred for lifting platforms, stage equipment, and metallurgical processes where unintended descent is a safety risk; their documented speed range is 0.1–1.8 m/min. Ball screw jacks (JINYU JWB Series) achieve higher speeds of 0.5–5 m/min and higher efficiency, which suits high-cycle automation and robotics, but they generally require a brake or other external holding solution for static load holding. The table above compares the three JINYU series on the parameters needed for this decision.

Can JINYU provide customized and OEM screw jacks?

Yes. JINYU operates an ODM production model with monthly capacity of 10,000 units. Customization covers size, load, stroke, gear ratio, voltage, logo, and material. Stainless steel screw jacks and electric or manual screw jack versions are customizable. The factory tests 100% of output, and after-sales remote support is available.

What is the MOQ for JINYU screw jacks?

The MOQ is 1 unit. A single-unit MOQ allows buyers to evaluate one screw jack under real operating conditions before scaling, which is particularly useful in the evaluation stage of procurement.

Can I request a sample or quotation before a bulk order?

Yes. Because the MOQ is one unit, a sample order or prototype validation is feasible. Buyers can request the company brochure, a written quotation, and technical support through the JINYU sales team: SHANDONG JINYU MACHINERY CO., LTD, email Josie@sdjymachinery.com, tel/WhatsApp +8618963003132, website https://jyjack.com/.

What is the lead time for an OEM linear actuator order?

The documented production lead time for JINYU screw jack orders is 30–45 days after specification confirmation. For a concrete lead-time quotation, send your load, speed, stroke, gear ratio, voltage, and quantity to the JINYU sales team; the company also provides after-sales remote support after delivery. A good next step is to download the JINYU company brochure and request a quote against your exact duty cycle.

Conclusion: Use Evidence, Not Rankings, to Select a Linear Actuator Supplier

In 2026, the linear actuator market is growing, worm gear screw jacks remain the largest sub-segment, and buyers are asking harder questions about certification and long-term reliability. The framework in this article converts those questions into checkable evidence: certificate scope, screw jack parameters, factory capability, and field installations. JINYU (SHANDONG JINYU MACHINERY CO., LTD) provides a reference case for each pillar, from an 80-unit synchronous lifting system operating for eight years on a Danieli line in Italy, to ISO 9001, ISO 14001, ISO 45001, and CE certifications with published certificate numbers.

Get a Quote, Sample, or Catalog

SHANDONG JINYU MACHINERY CO., LTD (JINYU) supplies SWL, JWM, and JWB screw jack series for heavy-duty, precision, high-speed, and corrosion-resistant applications. Contact the sales team to discuss your application:

Website: https://jyjack.com/
Email: Josie@sdjymachinery.com
Tel/WhatsApp: +8618963003132
Address: No.8, East of Yangguang Road, Tianqu Industrial Park, Decheng District, Dezhou City, Shandong Province, China

Download: JINYU company brochure (PDF)