Which cylinder construction is typically used for heavy-duty applications?

• A. Rolled body
• B. Tie-rod
• C. Aluminum
• D. Plastic

Answer: (B)

In hydraulic cylinder design, the way the ends and barrel are held together determines how well the unit can handle high loads. Tie-rod construction uses external steel tie rods that clamp the end caps to the barrel. When the cylinder is pressurized, the end caps tend to be pulled away from the barrel; the tie rods resist this separation, distributing the load across many rods. That makes the assembly exceptionally strong, supports larger bores and longer strokes, and keeps the cylinder easy to service—end caps and rods can be replaced or tightened without reworking the entire barrel. This robustness and serviceability are what make tie-rod cylinders the common choice for heavy-duty applications. In contrast, rolled-body designs rely on a welded or rolled shell and are typically less modular for extremely high-pressure, high-load service, and materials like aluminum or plastic don’t offer the same strength and wear resistance as steel for heavy-duty use.