Piston Rod For Hydraulic Cylinders

Why Choose Us

1. Our Certificates

We have already passed and strictly adhere to the ISO9001:2008 international quality system. Complete and advanced inspection apparatus, along with superior production equipment, adequately ensure product quality.

2. Our Company

Our factory is located in a city famous for peaches on the shores of Taihu Lake in Wuxi. Transportation is very convenient, with the Wuxi Airport and railway station only 30 minutes away, and we are about 1 kilometer from the entrance of Luqu of Wuxi-Yixing Expressway (part of the Shanghai-Nanjing Expressway). The factory covers an area of about 25,000 square meters and employs over 200 people, including more than 20 technical engineers.

3. Products Applications

Precision long small-diameter axles are widely used in the mining machinery industry, textile and printing machinery industries, etc., as hydraulic piston rods, guide rods, guide pins, and guide spindles. Hydraulic cylinder piston rods are mainly supplied as OEM parts to many large and medium enterprises, such as Heli Forklift Ltd, Hangzhou Forklift Ltd, and Sanyi Heavy Industry Ltd.

4. Sales Market

In recent years, we have enjoyed a good reputation for high quality and excellent after-sales service. Additionally, our products are exported to the USA, Canada, Southeast Asia, India, Brazil, etc.

Problems and solutions Piston Rod For Hydraulic Cylinders

1. Incorrect rod size

Two problems can occur if you choose a larger or smaller rod than necessary. An error in rod size is especially dangerous in long-stroke systems. It can cause the rod to bend or break when the cylinder is under load. And a rod that is too large in diameter will reduce retracting force if that is where the cylinder is under the greatest load. These problems can be avoided at the design stage. Therefore, it is very important to properly calculate the load on the hydraulic cylinder.

2. Thread breakage on the rod

Such a problem can occur for many reasons. But one of the main causes is always incorrectly calculated threads in the design. Diameter and thread pitch play a special role in thread reliability and strength.

3. Scratches on the rod

Scratches on the piston rod rarely affect the strength of the hydraulic cylinder. However, they can significantly damage the seals, resulting in hydraulic fluid leakage. Only the use of high quality hardened steel can minimize the likelihood of scratches on the hydraulic cylinder piston rod. The thickness and quality of the chrome coating on the rod is also very important. Quality chrome plating gives the surface of the rod extra strength and protection against corrosion.

4. Piston rod thread corrosion

If your hydraulic cylinders are to be used in aggressive environments with high humidity or exposure to harmful chemicals, corrosion is inevitable. Corrosion can significantly weaken the threads in a fairly short period of time. Therefore, when planning the production of hydraulic cylinders, it is very important to choose the right material from which the piston rod of the hydraulic cylinder will be made.

5. Mechanical damage

Mechanical damage to hydraulic cylinders is a rare occurrence in industrial equipment. However, mobile equipment is more susceptible to collisions with various objects or other machinery. This can cause dents on the hydraulic cylinder piston rod. It is very difficult for the ordinary person to imagine the power of a hydraulic cylinder and its massive rods that are used in crane booms or excavator bucket handles. With the power and complexity of the job being done, almost any collision with objects or parts of other equipment will cause dents or potholes in the hydraulic cylinder rod. This results in hydraulic fluid leakage and a significant loss of power. Such a hydraulic cylinder can no longer carry the specified load and such equipment becomes dangerous.

Care And Precautions For The Product

1. Cleaning & Maintaining Hydraulic Cylinders

Conducting regular maintenance inspections of your hydraulic cylinder helps you avoid costly breakdowns, plan for necessary repair or replacement costs, and ensure your equipment runs smoothly. Along with wiping down and cleaning your hydraulic cylinder before conducting maintenance, check for loose fittings, worn or damaged seals and hoses, or other issues that may require repair.

2. Properly Maintain Hydraulic Fluids

Since most hydraulic cylinder failures are a direct result of contamination, maintaining the cleanliness of hydraulic fluid is critical. One of the first lines of defense in controlling contamination in hydraulic fluid is to make it harder for particles to enter the system while removing any particles already present. A few ways to maintain clean hydraulic fluids include, but are not limited to:

Installing, inspecting, and maintaining all component seals

Upgrading filters to capture smaller particles

Ensuring filters are equipped with a gauge or switch to indicate clogs

Collecting bottle samples to be sent to a local laboratory for analysis

Applying a portable particle counter to monitor contamination levels.

By checking the fluid cleanliness regularly, you can easily ensure that your preventative maintenance is effective. Scheduled fluid analysis can include water content and parts per million of specific wear metals and contaminants. 

3. Check & Maintain Hydraulic Cylinder Oil Conditions

Checking for insufficient oil should also be routine when maintaining hydraulic cylinders as low levels or escaped fluid can lead to slow-functioning cylinders and poorly performing systems. Always monitor the performance and condition of internal pumps, valves, and actuators. Externally, a burst hose is usually the culprit and is easy to find.

Another cause of hydraulic cylinder failure comes from high oil temperatures. High-temperature oil can lead to an overheated hydraulic system, resulting in a full system breakdown. These high temperatures can be caused by clogged cooler vents, relief valves set too low, using incorrect fluid viscosity, or a pump with high leakage out the case drain. Regular cylinder maintenance can help you identify and repair or clean these components before day-to-day operations are impacted.

4. Tie Rod Cylinder

Tie rod-style hydraulic cylinders use high-strength threaded steel rods to hold the two end caps to the cylinder barrel. These designs are often used in industrial factory applications. Small-bore cylinders usually have four tie rods, and large bore cylinders may require up to 16 or 20 tie rods to retain the end caps under the forces produced. Tie rod-style cylinders can be completely disassembled for service and repair and are not always customizable.

5. Tandem Hydraulic Cylinder

In a tandem hydraulic cylinder, there are two interconnected cylinders that operate together. This  generates a greater force than one cylinder would create on its own. Tandem hydraulic cylinders' general applications include fork lift trucks, elevated work platforms, cranes and barges.

6. Cushioned Cylinder

The cushioned cylinder is designed with cushioned padding to prevent the piston's stroke from being too strong and stabilizing the cylinder's pressures. The metering device inside the cylinder controls and restricts the piston's power when operating and creates the cushioned effect results.