| Compact automation | Small clamping, indexing, positioning, and pick-and-place mechanisms | Bore: approximately 8–25 mm
Stroke: approximately 10–100 mm | Confirm that the actuator can provide the required force within the available installation envelope and maintain stable movement at low speed. | Dimensional inspection based on the approved engineering drawing; functional testing under rated hydraulic conditions. | Request dimensional reports, rated-load test records, and a defined acceptance tolerance for stroke and mounting features. |
| Robotics and end-effectors | Grippers, tool changers, compact wrist mechanisms, and mobile robotic equipment | Working pressure: commonly 70–210 bar
Stroke: application-specific | Use low-friction seals, controlled internal leakage, protected rod surfaces, and a compact port arrangement. | Pressure and leakage testing; cleanliness control; repeatability verification over multiple operating cycles. | Check cycle-life data, leakage limits, seal compatibility, and repeatability results using the intended hydraulic fluid. |
| Medical and laboratory equipment | Height adjustment, sample handling, precision positioning, and controlled linear motion | Force: application-dependent
Motion: low-speed, smooth travel | Prioritize smooth motion, low noise, corrosion-resistant surfaces, clean manufacturing, and materials compatible with the operating environment. | Risk-based product verification, material traceability, cleanliness inspection, and application-specific safety testing. | Review material certificates, cleaning compatibility, surface-finish data, and documented process controls. |
| Agricultural and outdoor machinery | Compact implements, dosing systems, small steering mechanisms, and auxiliary actuators | Working pressure: commonly 100–210 bar
Environment: dust, moisture, temperature variation | Provide corrosion protection, robust wiper seals, contamination tolerance, and protection against water and dust ingress. | Environmental exposure testing, pressure testing, corrosion evaluation, and seal performance testing. | Verify coating thickness, rod hardness, seal material, ingress protection design, and cold-start performance. |
| Material handling | Small lifting, diverter, gate, locking, and positioning mechanisms | Force: calculated from load, friction, and safety factor
Duty: intermittent or cyclic | Size the actuator for static and dynamic loads, avoid side loading, and include mechanical end stops where required. | Rated-load functional test; buckling assessment for extended rods; fatigue or cycle testing for repetitive applications. | Ask for load calculations, allowable side-load guidance, cycle-life results, and inspection records for rod alignment. |
| Operating pressure | All applications using hydraulic power | Common miniature-system ranges include approximately 70–210 bar; actual ratings depend on design and materials. | Define nominal, peak, and proof pressure separately. The actuator should not be operated above its documented rated pressure. | Hydrostatic pressure test and proof-pressure test according to the product specification and applicable hydraulic-cylinder practice. | Confirm pressure ratings, test duration, test medium, calibrated gauges, and recorded acceptance results. |
| Force capacity | Linear pushing and pulling applications | Approximate theoretical force is calculated as F = p × A; actual output is reduced by friction and pressure losses. | Consider extension and retraction forces separately, especially where the rod occupies part of the piston area. | Force verification at specified pressure, temperature, and flow conditions. | Request force-versus-pressure data and confirmation that the test setup matches the intended operating conditions. |
| Position accuracy and repeatability | Precision fixtures, inspection devices, and automated positioning | Performance depends on valve control, mounting rigidity, fluid compressibility, load variation, and sensor resolution. | Specify accuracy, repeatability, backlash, and acceptable drift separately instead of using a single generic tolerance. | Repeatability test over a defined number of cycles and operating points; measurement equipment should be calibrated. | Review test method, sample size, measurement uncertainty, and actual results under representative loads. |
| Leakage control | Systems requiring clean operation, stable holding, or minimal pressure loss | Limits should be stated as an application-specific internal and external leakage rate. | Use suitable piston, rod, wiper, and static seals; define leakage criteria at both ambient and operating temperature. | Static pressure-hold test, dynamic leakage test, and visual inspection after operation. | Confirm the leakage test pressure, hold time, fluid viscosity, temperature, and pass/fail threshold. |
| Materials and surface protection | Indoor, humid, corrosive, or washdown environments | Typical construction may include alloy steel or stainless steel components with engineered seal materials. | Match material selection and coating system to humidity, chemicals, temperature, and expected service life. | Material certificate review, hardness testing, coating-thickness inspection, and corrosion testing where specified. | Request batch traceability, material certificates, coating records, and documented compatibility with the hydraulic fluid. |
| Cleanliness and contamination control | Fine-control systems and applications with small valves or narrow passages | Cleanliness level should be defined by particle count, contamination sensitivity, and system requirements. | Flush internal passages, protect ports during storage, and package the actuator to prevent ingress of dust and moisture. | Particle-count or gravimetric cleanliness inspection according to the agreed quality plan. | Check flushing records, port protection, packaging method, and cleanliness acceptance criteria. |
| Temperature capability | Indoor machinery, outdoor equipment, and temperature-variable installations | Many standard hydraulic components are designed around approximately -20°C to +80°C, but the actual range is product-specific. | Evaluate seal performance, fluid viscosity, start-up force, and pressure rating at minimum and maximum operating temperatures. | Low- and high-temperature functional testing using the specified hydraulic fluid and operating cycle. | Verify documented temperature limits, seal compound, fluid recommendation, and cold-start test results. |
| Durability and cycle life | Production equipment and mechanisms with frequent repeated movement | Cycle life depends on load, stroke, speed, pressure, side load, contamination, and maintenance conditions. | Define the complete duty cycle and inspect seals, rod surfaces, fasteners, and leakage after testing. | Accelerated life or endurance testing using representative pressure, load, speed, and cycle frequency. | Request cycle-test conditions, failure criteria, inspection intervals, and corrective-action records. |
| Documentation and traceability | Regulated, safety-related, or high-volume industrial projects | Documentation should cover specifications, drawings, materials, tests, changes, and batch identification. | Maintain revision control and ensure each delivered actuator can be linked to production and inspection records. | Quality-management procedures, inspection plans, nonconformance control, and calibration records. | Evaluate sample inspection reports, certificate formats, change-notification procedures, and after-sales response times. |
