{"id":1068,"date":"2026-10-02T03:06:51","date_gmt":"2026-10-02T03:06:51","guid":{"rendered":"https:\/\/zqhydrauliccylinder.com\/?p=1068"},"modified":"2026-10-02T03:06:51","modified_gmt":"2026-10-02T03:06:51","slug":"how-to-determine-hydraulic-cylinder-size-for-an-oem-machine","status":"publish","type":"post","link":"https:\/\/zqhydrauliccylinder.com\/fr\/how-to-determine-hydraulic-cylinder-size-for-an-oem-machine\/","title":{"rendered":"How to Determine Hydraulic Cylinder Size for an OEM Machine"},"content":{"rendered":"

Hydraulic cylinder size is determined from the machine load case, available pressure, required motion, packaging and service duty. Bore controls theoretical force, rod diameter contributes to tensile strength and compression stability, and stroke defines travel. A valid selection also checks mounts, pins, speed, oil volume, pressure losses, side load and load-control requirements.<\/p>\n\n\n\n

This guide supports industrial engineering and procurement. Follow the machine manufacturer’s instructions and qualified safety procedures. Explore Hydraulique Zhenqiang<\/a>.<\/p>\n\n\n\n

Calculate cylinder force from machine geometry<\/h2>\n\n\n\n

Start with a free-body diagram across the full mechanism travel. Linkage angle and lever arm often make the worst cylinder load different from the largest external load.<\/p>\n\n\n\n

Include payload, self-weight, friction, acceleration, impact and applicable design margins. Distinguish extension and retraction requirements.<\/p>\n\n\n\n

Select bore from force and pressure<\/h2>\n\n\n\n

Required effective area is force divided by available working pressure. Convert area into a preliminary bore, then use the active extension or annular area as appropriate.<\/p>\n\n\n\n

Allow for circuit losses and do not treat maximum relief pressure as a continuous design pressure. Validate the complete pressure boundary.<\/p>\n\n\n\n

Select rod, stroke and mounts<\/h2>\n\n\n\n

Rod size requires tension, compression buckling, fatigue, thread and connection checks. Long stroke and poor end fixity can make rod stability govern before hydraulic force.<\/p>\n\n\n\n

Mounting centers, pin sizes, bearing area and articulation must suit the real load path. The cylinder should not absorb continuous side load caused by misalignment.<\/p>\n\n\n\n

Check speed, duty and environment<\/h2>\n\n\n\n

Flow divided by effective area gives theoretical speed. Verify cycle time, heat, cushioning, seals, contamination, temperature and corrosion exposure.<\/p>\n\n\n\n

Document all assumptions in a controlled specification and confirm fit through the full machine envelope before approving production.<\/p>\n\n\n\n

Practical reference<\/h2>\n\n\n\n
Sizing input<\/th>Primary design effect<\/th><\/tr><\/thead>
Required force and pressure<\/td>Bore and pressure demand<\/td><\/tr>
Stroke and installed lengths<\/td>Travel and package fit<\/td><\/tr>
Rod length and end conditions<\/td>Buckling and stiffness<\/td><\/tr>
Flow and cycle time<\/td>Speed, losses and heat<\/td><\/tr>
Mounting geometry<\/td>Pins, bearings and side load<\/td><\/tr>
Environment and fluid<\/td>Seals, coatings and materials<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Information to document<\/h2>\n\n\n\n