{"id":1038,"date":"2026-09-30T02:53:00","date_gmt":"2026-09-30T02:53:00","guid":{"rendered":"https:\/\/zqhydrauliccylinder.com\/?p=1038"},"modified":"2026-09-30T02:53:00","modified_gmt":"2026-09-30T02:53:00","slug":"what-are-the-parts-of-a-hydraulic-cylinder-and-what-do-they-do","status":"publish","type":"post","link":"https:\/\/zqhydrauliccylinder.com\/ru\/what-are-the-parts-of-a-hydraulic-cylinder-and-what-do-they-do\/","title":{"rendered":"What Are the Parts of a Hydraulic Cylinder and What Do They Do?"},"content":{"rendered":"

The main hydraulic cylinder parts are the barrel, piston, piston rod, gland or head, end cap, seals, wiper, wear rings or bearings, ports and mounting ends. Retainers, cushions, sensors and valve manifolds may be added. Each part contributes to pressure containment, guidance, sealing, load transfer or control.<\/p>\n\n\n\n

For related product families, visit \u0413\u0438\u0434\u0440\u0430\u0432\u043b\u0438\u043a\u0430 \u0427\u0436\u044d\u043d\u0446\u044f\u043d<\/a>. This guide supports engineering review and does not replace the machine manufacturer’s safety instructions or a qualified hydraulic professional.<\/p>\n\n\n\n

Barrel, end cap and pressure boundary<\/h2>\n\n\n\n

The barrel provides the internal bore in which the piston moves and forms the main pressure boundary. Bore geometry and finish affect seal behavior, friction and leakage.<\/p>\n\n\n\n

The base or end cap closes the cap end and transfers load into its mount. Depending on construction, it may be welded, threaded, bolted or retained by another controlled method.<\/p>\n\n\n\n

Piston, rod and gland<\/h2>\n\n\n\n

The piston separates the two chambers in a double-acting cylinder and carries seals and wear components. The rod connects the piston to the machine and transmits force through the gland.<\/p>\n\n\n\n

The gland or head closes the rod end, supports the rod bearing, holds the rod seal and wiper, and provides a service interface on many designs.<\/p>\n\n\n\n

Seals, wipers, bearings and wear rings<\/h2>\n\n\n\n

Piston seals limit internal bypass, rod seals retain fluid and wipers reduce incoming contamination. Static seals close stationary joints. Seal material and profile must match pressure, speed, temperature, fluid and surface condition.<\/p>\n\n\n\n

Bearings and wear rings guide the moving assembly and separate metal surfaces. They are not a substitute for correct machine alignment and should not be used to absorb continuous side load outside the design.<\/p>\n\n\n\n

Ports, mounts and optional controls<\/h2>\n\n\n\n

Ports connect the cylinder to the hydraulic circuit. Their thread, sealing method, size, position and orientation affect installation and flow performance.<\/p>\n\n\n\n

Eyes, clevises, trunnions, flanges and cross tubes transfer force into the machine. Optional cushions control end-of-stroke deceleration, sensors report position and integrated valves can support load-control functions.<\/p>\n\n\n\n

Practical reference<\/h2>\n\n\n\n
Part<\/th>Primary function<\/th><\/tr><\/thead>
Barrel<\/td>Contains pressure and guides the piston<\/td><\/tr>
Piston<\/td>Separates chambers and transfers fluid force<\/td><\/tr>
Rod<\/td>Transmits linear force to the machine<\/td><\/tr>
Gland\/head<\/td>Guides and seals the rod end<\/td><\/tr>
Seals and wiper<\/td>Control leakage and contamination<\/td><\/tr>
Wear rings\/bearings<\/td>Guide motion and prevent metal contact<\/td><\/tr>
Mounts<\/td>Transfer cylinder force into the structure<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

What to send for an engineering review<\/h2>\n\n\n\n