Technical Foundation
What Is a Hydraulic Industrial Cylinder Mount?
Cylinder mounts translate the linear force of a hydraulic cylinder into the machine structure, and the mount style determines how that force and any side load is handled: clevis mounts pin the cylinder at one end and allow it to pivot through the stroke, ideal where the load path itself changes angle; trunnion mounts pin the cylinder at its midpoint or head, letting it pivot while centering the load along the cylinder's centerline to minimize side loading on the rod seal; and flange or foot mounts rigidly fix the cylinder in a straight-line application with no pivoting.
Mount hardware is sized and dimensioned to NFPA (US) or ISO 6020/6022 (metric) interchangeability standards, matched to the cylinder's bore diameter — a mount rated for a 3-inch bore cylinder will not correctly support a 4-inch bore cylinder even if it can be physically forced on, because pin diameter, bracket thickness and bolt pattern are all sized to the expected force at that bore. Rod-end hardware (clevises, spherical rod eyes) similarly must be rated for the cylinder's rated working pressure and stroke to avoid becoming the weak link in the assembly.
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| Spec | What It Means | Why It Matters |
|---|---|---|
| Mount Style | Clevis, trunnion, flange, foot | Determines whether the cylinder pivots with the load or is rigidly fixed in a straight-line path |
| Standard | NFPA (US) or ISO 6020/6022 (metric) | Ensures mount hardware interchangeability with cylinders built to the matching standard |
| Bore Size Match | Sized to cylinder bore diameter exactly | Mount pin diameter and bracket strength are rated to the force generated at that specific bore |
| Pin/Bearing Type | Plain pin vs. spherical bearing rod eye | Spherical bearings accommodate slight misalignment; rigid pins require precise alignment |
| Load Rating | Rated to cylinder's max working pressure/force | Undersized mount hardware becomes the failure point rather than the cylinder itself |
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Applications
Where Hydraulic Industrial Cylinder Mounts Get Used
Cylinder mounts are specified wherever a hydraulic cylinder must transfer force into a machine structure, whether pivoting or fixed.
Mobile Hydraulic Equipment
Clevis and pin mounts on excavator, loader and dump-body cylinders allowing pivoting motion through the work cycle.
Industrial Presses & Fixtures
Trunnion and flange mounts fixing press cylinders in precise straight-line actuation.
Material Handling Equipment
Foot and flange mounted cylinders actuating lift and clamp mechanisms.
Agricultural Equipment
Clevis-mounted cylinders on implement lift arms and steering assemblies.
Marine & Offshore Equipment
Trunnion mounts on deck machinery cylinders requiring pivoting under variable load angles.
Machine Tool & Automation
Flange-mounted cylinders in fixed actuation stations on automated production equipment.
Brands
Hydraulic Industrial Cylinder Mounts Brands in the Catalogue
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FAQ
Hydraulic Industrial Cylinder Mounts Questions, Answered
How do I choose between a clevis mount and a trunnion mount?
Choose a clevis mount when the cylinder needs to pivot through an arc as the load angle changes, such as a lift arm or bucket cylinder — the clevis pin allows this rotation at one end. Choose a trunnion mount when the load path is more linear but the cylinder still needs to accommodate slight angular movement, since trunnion pins are located at the cylinder's midpoint or head, centering the load along the bore's centerline and reducing side-loading on the rod seal compared to an end-pivoting clevis.
Can I mix NFPA and ISO mounting hardware?
Generally no — NFPA (inch-based, US standard) and ISO 6020/6022 (metric) cylinders and mounting hardware have different dimensional standards for bolt patterns, pin diameters and bracket dimensions, so hardware built to one standard typically will not bolt directly to a cylinder built to the other without an adapter, if one exists at all.
What determines the correct mount size for my cylinder?
Mount hardware is sized to the cylinder's bore diameter, since bore size directly determines the maximum force the mount must transfer. Always match mount hardware to the exact bore diameter rather than assuming a mount rated for a nearby size will handle the load — an undersized mount becomes the failure point in the assembly well before the cylinder itself fails.
Why would I use a spherical bearing rod eye instead of a standard clevis pin?
A spherical bearing rod eye accommodates slight angular misalignment between the cylinder and the pin-connected structure as the assembly moves through its range of motion, reducing binding and premature wear that a rigid pin connection would otherwise experience if the load path isn't perfectly aligned throughout the stroke.
Does the mounting style affect how much side load the cylinder rod seal experiences?
Yes significantly — mounts that don't keep the load centered on the cylinder's centerline (such as a poorly positioned clevis on a long-stroke cylinder) introduce side loading that accelerates rod seal and bushing wear. Trunnion mounts are specifically favored in applications with meaningful side-load risk because they center the pivot point closer to the load's actual line of action.
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