Gas Springs Manufacturer and Supplier
Changzhou Andefu Gas Spring Co., Ltd. (ADF) designs and manufactures gas springs and gas lift cylinders for seating, automotive, medical, and industrial equipment. As a direct Gas Springs manufacturer in China, we control the entire production chain—from tube processing and gas filling to final testing—ensuring consistent force, smooth motion, and long service life.
Our Product Range
We supply a complete family of gas springs tailored to different motion and load requirements. Each type is available in standard configurations or custom-built to your drawings and samples.
Office Chair Gas Lift Cylinders
For ergonomic seating with smooth height adjustment and damping. Outer tube lengths from 155 mm to 710 mm, force 300–500 N, black spray or electroplated finishes. Suitable for boss chairs, gaming chairs, and task seating.
Bar Stools Gas Springs
Compact, high-cycle springs for bar stools and counter-height seating. Designed for frequent use, with quiet operation and reliable locking at any height.
Automatic Spring Lift Gas Struts
For lids, doors, and panels that need assisted opening and controlled closing. Ideal for automotive hatches, machine guards, and access panels.
Auto-return Gas Springs
Self-closing springs that automatically return to a defined position. Used in toolboxes, medical devices, and consumer appliances where hands-free operation is required.
We also produce Support Gas Springs for counterbalancing and Lockable Gas Springs for applications requiring position locking at any point in the stroke.
Application Fit and Engineering
Our gas springs are engineered around the specific working point, mounting geometry, and cycle life of your application. We consider the following variables when configuring a solution:
- Force requirement – static and dynamic loads, including safety factors for temperature and wear.
- Stroke length – from short travel (50 mm) to long travel (up to 710 mm in chair cylinders).
- Mounting style – ball joints, clevis, fork ends, or custom end fittings.
- Operating environment – indoor, outdoor, temperature range, humidity, and exposure to chemicals.
- Cycle frequency – high-cycle seating vs. occasional lid lifts.
Our R&D team works from your drawings or samples to develop products that meet dimensional and performance specifications. We use advanced automated production lines and CNC machining to maintain tight tolerances.
Quality Control and Testing
Every batch undergoes strict inspection from incoming material to final assembly. We test for force consistency, damping behavior, leak tightness, and durability. Our chair gas cylinders are fatigue-tested to over 50,000 cycles with load capacities up to 150 kg, depending on model.
We operate advanced testing equipment and follow documented process controls to ensure traceability. Our factory covers 6,000 m² and houses 15 production lines, with an annual capacity exceeding 20,000 tons.
Customization and OEM Support
We are primarily a custom manufacturer. You can specify:
- Force (N) and stroke (mm) to match your mechanism.
- Surface finish – black spray, electroplating, stainless steel, or powder coating.
- End fittings – standard or custom designs.
- Damping characteristics – soft, medium, or firm.
- Locking options – free lift, locked at any position, or auto-return.
We also supply standard parts for office chairs, including Standard Height Heavy Duty Office Chair Gas Lift Cylinders and Black/Electroplating Surface Adjustable Office Chair Gas Lift Cylinders Replacement.
Production and Delivery
Our factory is located in Changzhou, Jiangsu Province, close to Shanghai and Nantong ports. We ship worldwide by sea, air, or express. For mass production, we typically require a 30% deposit and 70% balance against shipping documents. We also offer FOB, CIF, and CNF terms.
We maintain stock for standard office chair cylinders and can deliver quickly. Custom orders are scheduled based on your volume and specification.
Information We Use to Configure Your Solution
To prepare an accurate quotation and technical proposal, please provide the following details:
| Parameter |
Required Information |
| Application |
Product type (chair, lid, hatch, etc.) and operating environment |
| Load and force |
Weight to be lifted or held, desired force in Newtons |
| Stroke and dimensions |
Required travel, overall length, tube diameter, mounting centers |
| Mounting |
End fitting type and orientation |
| Finish |
Surface treatment preference (paint, plating, stainless) |
| Quantity and timeline |
Estimated annual volume and target delivery date |
If you have a drawing or sample, send it with your inquiry. We will review and confirm feasibility before quoting.
Frequently Asked Questions
What is the lead time for custom gas springs?
Lead time depends on complexity and quantity. Standard office chair cylinders are often in stock. Custom orders typically take 2–4 weeks after sample approval. We confirm exact timing with each quotation.
Can you match an existing gas spring from a competitor?
Yes. Send us the original part or its dimensions, force, and stroke. We can reverse-engineer and produce a compatible replacement, often with improved durability.
Do you offer stainless steel gas springs?
We produce stainless steel gas struts for marine, medical, and outdoor applications. Specify the grade (e.g., 304 or 316) and we will configure accordingly.
What is the minimum order quantity?
For standard parts, MOQ is 500 pieces. For custom products, MOQ depends on tooling and production setup. We can discuss lower quantities for samples or pilot runs.
How do you ensure quality for large orders?
We implement in-process inspections and final testing on every batch. We can provide test reports and certificates upon request. Our quality system is based on documented procedures and traceability.
Do you provide technical support after purchase?
Yes. We offer free lifetime technical consultation, installation guidance, and spare parts support. Our team is available by phone, email, or video call.
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