Revive your sinking office chair with Colewell's Heavy Duty Office Chair Cylinder. Engineered for durability and safety, our gas lift springs are the heart of any ergonomic seating system. Unlike cheap, standard cylinders that fail after a year, our Class 4 certified cylinders are built with thickened steel walls to support heavier loads and prevent sinking.
Designed as a universal replacement, these cylinders fit 99% of office chairs, gaming chairs, and executive chairs on the market. Whether you are a furniture manufacturer or a user fixing a broken chair, our gas lifts offer smooth height adjustment and 360-degree silent rotation.
Safety Class | Class 3 & Class 4 (Heavy Duty). Meets BIFMA X5.1 safety standards. Class 4 offers thicker walls for maximum safety. |
Load Capacity | Class 3: Up to 150kg (330lbs). |
Dimensions | Outer Tube: 50mm (2 inches). |
Material | Seamless Steel Pipe with Chrome or Black Powder Coating. Nitrogen gas filled (99.99% purity). |
Our cylinders feature a standard 50mm (2") outer diameter that fits into almost all 5-star chair bases. The top taper fits standard seat mechanisms.
Safety is our priority. Our Class 4 cylinders use thickened seamless steel pipes (2.0mm - 2.5mm wall thickness) to prevent bursting under high pressure.
Precision machining ensures the piston glides smoothly without sticking. The integrated bearing allows for silent, effortless 360° rotation.
• Stroke: Short stroke (for tall people) or long stroke (for drafting stools).
• Finish: Chrome for executive chairs or Black for gaming/standard chairs.
Daily Use: The standard 120mm (4.7") stroke cylinder is perfect for most desk chairs, providing the ideal height range for computer work.
Heavy Duty: Class 4 cylinders are recommended for gaming chairs to support prolonged use and dynamic movement without sinking.
Extra Tall: We offer long-stroke cylinders (200mm - 260mm) specifically for high bar stools and drafting tables.
Premium Look: Chrome-plated cylinders add a sleek, professional touch to leather executive chairs while providing robust support.
Thickened steel walls support up to 450lbs, preventing sinking.
Standard 2" diameter fits 99% of office and gaming chairs.
High-quality bearings ensure silent and smooth 360° swivel.
BIFMA, SGS, and TUV certified for explosion-proof reliability.
Heat-treated steel and premium seals guarantee long service life.
Drop-in installation. Remove the old one and insert the new one.
Colewell is a leading manufacturer of high-performance gas lift cylinders for office furniture. We prioritize safety above all else, ensuring every cylinder we produce is rigorously tested to BIFMA standards.
Whether you need a single replacement or bulk orders for furniture manufacturing, our Class 3 and Class 4 cylinders offer the peace of mind and durability you deserve.
A: Our cylinders have a standard 50mm (2") outer diameter and 28mm (1.1") inner piston. This is the universal standard for 99% of office chairs (IKEA, Staples, Herman Miller, etc.).
A: Class 4 has thicker steel walls and can support more weight (up to 450lbs) compared to Class 3. We recommend Class 4 for maximum durability.
A: You usually need a pipe wrench or a hammer. Apply penetrating oil, wait, then twist the cylinder with the wrench or tap the base with a hammer to loosen it.
A: Yes, we offer a warranty against sinking or failure. Our Class 4 cylinders are designed to last for many years of daily use.
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