All the dimensions are in millimeters

We specialize in the manufacture of trunnion hydraulic cylinders, designed to provide robust, pivoting hydraulic force with superior stability and precision in heavy-duty industrial applications.

What is a Trunnion Hydraulic Cylinder?

A trunnion hydraulic cylinder incorporates pivot points (trunnions) attached to the cylinder body—usually on the head, cap, or intermediate locations—that allow the cylinder to rotate around these mounts. This pivot action supports higher pressures and heavier loads than traditional fixed-mounted cylinders by reducing bending stresses on the cylinder barrel and rod.

Key Features of Trunnion Hydraulic Cylinders

• Pivoting Mount Design: Trunnions act as pivot pins enabling the cylinder to move smoothly within heavy machinery while maintaining stability under load.
• Dual Support: Unlike single-end rod mounting, trunnion cylinders are supported on two pivot points, minimizing barrel deflection and wobble under high pressure.
• Heavy-Duty Construction: Typically made from high-strength steel or alloys, components such as the barrel, piston rod, and trunnions are CNC-machined for exact tolerances and surface finishes to ensure reliability under intense conditions.
• Custom Mounting Configurations: Trunnions can be positioned as per application needs—whether at the base, near the rod end, or intermediate—allowing integration into complex mechanical systems.
• Enhanced Durability: Precision welding and machining combined with hard chrome plating on piston rods ensure excellent wear resistance and corrosion protection.

Manufacturing Process Overview

1. Material Selection and Preparation
   High-grade seamless steel tubes for barrels and forged steel for trunnions are selected. Materials undergo quality inspection including certifications and tests to ensure strength and fatigue resistance.
2. Precision Machining
   Cylinder barrels, piston rods, trunnions, end caps, and other parts are CNC-machined with tight tolerances. Internal barrel surfaces are honed for smooth piston movement. Trunnion pivots are machined with high accuracy to ensure proper fit with bearings.
3. Welding and Assembly
   Trunnions are welded or attached to the cylinder barrel with precision techniques such as MIG or TIG welding to maintain concentricity and structural integrity. Components are assembled with seals, bearings, and lubrication points installed for optimal performance.
4. Surface Treatments
   Critical surfaces, especially piston rods and trunnion pivots, receive hard chrome plating or polishing for enhanced durability and corrosion resistance.
5. Testing and Quality Control
   Each trunnion cylinder undergoes hydraulic pressure testing—often at 1.5 times the rated working pressure—to ensure leak-free and robust operation. Dimensional inspections verify mount alignment and sealing integrity.

Applications

Trunnion hydraulic cylinders are ideal for use in:

• Construction equipment like excavators and loaders
• Material handling machinery
• Agricultural machinery
• Heavy industrial automation where pivoting and heavy loads are involved

Why Choose Our Trunnion Hydraulic Cylinders?

• Precision-engineered pivot mounts for smooth operation and longer service life
• Heavy-duty materials and manufacturing quality to perform reliably under demanding conditions
• Custom design flexibility to fit specific installation and load requirements
• Comprehensive testing and support to ensure operational confidence

Contact us today to discuss your trunnion hydraulic cylinder requirements and receive a custom-engineered solution built for stability, strength, and efficiency in your heavy-duty applications.