Pneumatic & hydraulic components
Hydraulic Cylinder Replacement Specification Guide
Bore and stroke do not define a hydraulic cylinder. A replacement must also preserve the mounting geometry, rod and pin interfaces, ports, pressure and force requirements, speed, seals, cushioning, sensing, environment, and load path.
Record manufacturer, model, serial, tag, drawing number, and any repair-kit, rod, or seal-kit references.
Measure bore, rod diameter, stroke, retracted and extended lengths, rod-end thread, and critical envelope dimensions.
Record clevis, trunnion, flange, foot, pin, spherical bearing, or other mount geometry, including pin diameters, widths, centers, and orientation.
Capture port type, thread, size, location, orientation, working pressure, return pressure, and circuit plumbing.
Record required push/pull force, load direction, speed, cycle rate, side load, shock, buckling risk, and duty cycle.
Capture seal material, fluid, temperature, rod coating, corrosion exposure, cushioning, position sensing, stops, and special standards.
Bore, rod, pressure, mounting, column strength, side load, and safety factors must support the actual forces.
Verify stroke plus pin-to-pin or mounting dimensions through the complete motion envelope.
Port standard, orientation, pressure rating, flow, and circuit behavior must suit the existing hydraulic system.
The mount must transmit the intended load without introducing unacceptable side load, binding, or misalignment.
Fluid, temperature, speed, cushioning, sensing, rod material/coating, and environmental requirements must be preserved.
Parker's cylinder specification guidance includes capacity, stroke, speed, temperature, mounting, bore, rod, materials, and seals as interacting selection factors.
A cylinder with the correct stroke can still fail to fit or reach the required machine positions.
Cylinder mounts affect how forces, moments, and alignment are carried into the structure.
The pressure force may be adequate while the rod, mount, or alignment is unsuitable for the application.
Not without verifying rod size, mounted lengths, mount and pin geometry, ports, pressure, force, speed, seals, cushioning, sensing, fluid, and environment.
Retracted/extended length, mounting centers, pin or flange geometry, rod-end interface, rod diameter, port locations, and the available envelope are usually critical.
That requires an application review because mounting style changes the load path, alignment behavior, and structural forces.