Honeywell Hydraulics manufactures heavy-duty trunnion mounted hydraulic cylinders designed for severe industrial applications requiring rotary or pivoting motion. Engineered with centerline trunnion mounts, these cylinders distribute immense forces evenly, providing exceptional stability and extremely long operating life in steel plants, presses, and construction machinery.
In heavy industrial applications where machinery must pivot under extreme loads, standard end-mounting methods are often insufficient. Trunnion mounted hydraulic cylinders solve this by utilizing two heavy-duty pivot pins (trunnions) mounted directly to the cylinder barrel, either at the head, cap, or an intermediate position along the tube.
The defining advantage of a trunnion mount is that it aligns the pivot point directly on the cylinder's true centerline. This design eliminates eccentric loading and minimizes the destructive bending moments that cause rapid rod seal and bearing failure. When the cylinder extends or retracts, the entire body can rotate smoothly within the machine's mounting blocks, effortlessly absorbing the arc of the moving load.
At Honeywell Hydraulics, our trunnion cylinders are the backbone of massive industrial automation and material handling systems. We utilize ultra-high-strength forged trunnion blocks and precision machining to ensure absolute concentricity, delivering unmatched reliability for steel mills, hydraulic presses, and heavy mining equipment.
Our trunnion mounted cylinders are engineered to provide maximum stability and longevity in heavy-duty pivoting applications.
Trunnion pins are mounted exactly on the cylinder's centerline, ensuring forces are transmitted directly along the cylinder axis.
By eliminating off-center forces, trunnion mounting drastically reduces rod bending and uneven seal wear.
Manufactured with heavy-duty forged steel trunnions to withstand immense tensile and compressive shock loads.
Intermediate (center) trunnion mounts provide the highest degree of column strength for very long stroke cylinders.
Trunnion pins are precision machined to exacting tolerances to ensure perfect alignment with machinery mounting blocks.
Fully customizable trunnion positions (head, cap, or intermediate) to suit specific machinery design requirements.
Our trunnion mounted cylinders are built using premium materials to endure the harsh realities of heavy industrial applications.
| Parameter | Value |
|---|---|
| Bore Diameter | 40 mm to 500 mm |
| Stroke Length | Up to 4000 mm (Customizable) |
| Working Pressure | Up to 350 Bar |
| Testing Pressure | 1.5x Working Pressure |
| Mounting Positions | Head Trunnion, Cap Trunnion, Intermediate Trunnion |
| Trunnion Pin Diameter | Custom engineered per load requirement |
| Tube Material | ST52 Seamless Honed Tube (H8 Tolerance) |
| Piston Rod | EN8 / C45 / EN19 (Hard Chrome Plated) |
| Seal Kits | Polyurethane & PTFE (Parker / Hallite) |
| Surface Finish | Anti-corrosive epoxy or polyurethane coating |
We manufacture various trunnion placement styles depending on the machinery's mounting geometry and stroke requirements.
Trunnion pins are located at the front (rod end) of the cylinder barrel. This configuration provides the greatest column strength, making it ideal for long-stroke pushing applications.
Trunnion pins are located at the rear (blind end) of the cylinder. This allows the entire cylinder body to pivot freely and is commonly used when space at the front of the machine is limited.
Trunnion pins are welded or clamped at a specified position along the middle of the cylinder barrel. This provides a balance of stability and pivot range for specialized OEM machinery.
Understanding pivot dynamics is critical when designing machinery with limited space.
| Engineering Feature | Trunnion Mounted | Clevis Mounted |
|---|---|---|
| Pivot Location | Center, Front, or Rear | Strictly at the Ends |
| Buckling Resistance | Excellent (Intermediate trunnions cut column length in half) | Poor (Prone to buckling on very long strokes) |
| Space Efficiency | High (Can fit into tight front/rear spaces) | Low (Requires full end clearance) |
| Load Capacity | Ultra-Heavy (Forging presses, steel mills) | Heavy (Excavators, mobile equipment) |
Trunnion mounted cylinders are essential for heavy industrial machinery that requires powerful articulated movement.
Actuation for furnace doors, ladle tilters, and heavy continuous casting equipment.
Tilting mechanisms and specialized pressing automation requiring precise alignment.
Heavy-duty rotary tippers, industrial dumpers, and bulk material unloaders.
High-load articulation for massive mining shovels and specialized earthmoving equipment.
For extreme long-stroke applications, placing an intermediate trunnion near the middle of the barrel effectively halves the column length, massively increasing the buckling strength.
Trunnion pins act as the sole load-bearing axis. We calculate pin diameter based on the maximum dynamic shear force. Mating pillow blocks must be heavily lubricated or utilize self-lubricating bronze.
Unlike clevis mounts, trunnions require radial clearance around the cylinder barrel to allow the pins and pillow blocks to pivot freely without striking the machine chassis.
Our advanced manufacturing facility in Ahmedabad guarantees that every trunnion cylinder is built to endure brutal industrial environments. We focus heavily on trunnion block integrity and concentricity.
To withstand the immense shear forces of steel mills and presses, our trunnion blocks are CNC-machined from solid high-carbon forged steel, entirely eliminating the porosity risks of cast mounts.
The trunnion pins are turned on large-swing CNC lathes to ensure they are perfectly concentric with the cylinder bore axis, guaranteeing zero binding during heavy articulation.
Intermediate and front trunnion blocks are permanently fused to the heavy-wall ST52 barrel using multi-pass automated sub-arc welding, creating an unyielding monolithic structure.
Before dispatch, all trunnion welds undergo rigorous Non-Destructive Testing (NDT) via ultrasonic scanning to detect any microscopic sub-surface flaws, followed by 1.5x hydrostatic testing.
Our engineers can design and manufacture cylinders based on your specific trunnion placement, pin diameter, and stroke length requirements.
Heavy Industrial Plant — Gujarat, India
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