Custom Hydraulic Cylinders: Essential Information to Provide Manufacturers

Welcome to Quanzhou Weihang Machinery Co.,Ltd. 

What Information Do You Need to Provide to Manufacturers for Custom Hydraulic Cylinders?
Date : 2026-01-05 09:33:47Pageviews : 73



Hydraulic cylinders are critical components widely used in industrial machinery, construction equipment, agricultural implements, and other fields. Due to the diversity of application scenarios and operational requirements, custom hydraulic cylinders have become the preferred choice for most projects. However, to ensure that the customized product meets performance expectations, fits the installation space, and operates reliably for a long time, customers must provide comprehensive and accurate information to manufacturers. This article details the key information required for custom hydraulic cylinder orders, serving as a practical guide for procurement and technical personnel.

1. Basic Performance Parameters

Basic performance parameters are the foundation of hydraulic cylinder customization, directly determining the core functional characteristics of the product.
  • Bore Diameter and Rod Diameter: The bore diameter (inner diameter of the cylinder tube) and rod diameter (diameter of the piston rod) are key factors affecting the output force and movement speed of the hydraulic cylinder. Customers need to provide specific values (e.g., 100mm bore diameter, 63mm rod diameter) or calculate them based on the required working force and system pressure (force = pressure × effective area). For double-acting cylinders, it is also necessary to clarify the rod-side and cap-side effective areas if there are special speed requirements.
  • Stroke Length: Stroke refers to the maximum distance the piston rod can extend from the retracted state. It is crucial to provide the exact stroke length (e.g., 500mm) and consider the installation margin (usually 10-20mm) to avoid interference during operation. If the cylinder needs to stop at multiple positions within the stroke, additional positioning requirements should be specified.
  • Working Pressure and Test Pressure: Working pressure is the maximum pressure the cylinder will withstand during normal operation, while test pressure (typically 1.5 times the working pressure) is required for factory pressure testing. Customers must provide the system’s working pressure (e.g., 25MPa) to ensure the cylinder’s material thickness, seals, and structural design meet pressure resistance requirements.
  • Operating Speed: The required extension and retraction speeds of the piston rod (e.g., 0.1-0.5m/s) affect the selection of hydraulic fluid flow rate, cylinder port size, and buffer design. Excessively high speeds may cause impact, while excessively low speeds may lead to crawling phenomena, so accurate speed parameters are essential.

2. Installation and Structural Requirements

The installation method and structural design of hydraulic cylinders must match the equipment’s spatial layout and force transmission needs.
  • Mounting Style: Common mounting methods include flange mounting, trunnion mounting, clevis mounting, foot mounting, and threaded mounting. Customers need to specify the mounting type and provide relevant dimensions (e.g., flange bolt circle diameter, trunnion hole size, clevis pin diameter). For special installations (e.g., offset mounting), the angle and force direction should also be indicated.
  • Cylinder End Configuration: The cylinder cap and rod end can be designed as blind ends, flanged ends, or threaded ends. For applications requiring disassembly and maintenance, flanged or split ends are preferred. Additionally, if the cylinder needs to be submerged in liquid or work in a dusty environment, a sealed end cover with enhanced protection should be specified.
  • Piston Rod Configuration: The piston rod’s end is usually processed into a thread, pin hole, or flange to connect with the load. Customers must provide the rod end structure (e.g., M24×2 external thread, 25mm pin hole) and surface treatment requirements (e.g., hard chrome plating, ceramic coating) to improve wear resistance and corrosion resistance. For long-stroke cylinders, the piston rod may require additional support to prevent bending.
  • Port Size and Position: The hydraulic cylinder’s oil inlet and outlet ports (e.g., G1/2, M18×1.5) and their positions (e.g., top, side, bottom of the cylinder cap/rod end) need to match the system’s pipeline layout. If the cylinder needs to be equipped with quick connectors or pressure sensors, the corresponding interface specifications should be provided.

3. Working Environment and Operating Conditions

The working environment directly affects the material selection, protection level, and service life of hydraulic cylinders.
  • Ambient Temperature: The operating temperature range (e.g., -20℃ to 80℃) determines the choice of seals, hydraulic fluid, and material thermal stability. For extreme temperatures (e.g., below -30℃ or above 120℃), special low-temperature or high-temperature resistant materials (e.g., Viton seals, high-temperature alloy steel) are required.
  • Media Type: The type of hydraulic fluid used in the system (e.g., mineral oil, water-glycol, phosphate ester) affects the compatibility of seals and cylinder materials. For example, water-glycol media require seals resistant to hydrolysis, while phosphate ester media require corrosion-resistant metals (e.g., stainless steel).
  • Environmental Contaminants: If the cylinder operates in dusty, sandy, humid, corrosive (e.g., marine, chemical plants), or explosive environments, corresponding protection measures should be specified. This includes installing dust rings, scrapers, corrosion-resistant coatings (e.g., epoxy paint, zinc plating), or explosion-proof components.
  • Operating Frequency and Load Characteristics: The number of cycles per hour (e.g., 50 cycles/hour) and load type (e.g., static load, dynamic load, impact load) affect the cylinder’s fatigue strength and service life. For high-frequency or impact load applications, manufacturers will optimize the piston structure, weld quality, and material grade to enhance durability.

4. Additional Functional and Quality Requirements

In addition to basic performance and structural requirements, customers may have special functional or quality demands based on specific applications.
  • Buffer and Cushioning: For cylinders with large stroke or high-speed operation, buffer devices (e.g., adjustable buffer, integral buffer) are required at both ends to reduce impact during extension and retraction. Customers need to specify whether buffer is needed and the required buffer effect (e.g., buffer stroke of 30mm).
  • Position Sensing and Feedback: If the system requires real-time monitoring of the piston rod’s position, customers can request the installation of position sensors (e.g., magnetic proximity sensors, linear displacement transducers) and specify the sensor type, mounting position, and signal output format (e.g., NPN, PNP, 4-20mA).
  • Quality Standards and Certifications: Customers may require the hydraulic cylinder to comply with specific industry standards (e.g., ISO 6020/2, SAE J1209) or obtain certifications (e.g., CE, FDA for food machinery). Additionally, requirements for surface roughness (e.g., Ra 0.8μm for piston rod), weld quality (e.g., non-destructive testing), and leakage testing (e.g., no leakage under rated pressure) should be clearly stated.
  • Delivery and Packaging Requirements: The required delivery time, packaging method (e.g., waterproof packaging, wooden crate), and accompanying documents (e.g., product manual, test report, certificate of conformity) should be specified to ensure smooth receipt and use of the product.


Providing comprehensive and accurate information is the key to successful customization of hydraulic cylinders. By clarifying basic performance parameters, installation and structural requirements, working environment conditions, and additional functional demands, customers can help manufacturers design and produce products that perfectly match their application needs. In practical operations, it is recommended that customers maintain close communication with manufacturers’ technical teams, provide drawings or samples if possible, and jointly optimize the design to avoid misunderstandings and ensure the reliability, durability, and cost-effectiveness of the hydraulic cylinders.
Previous : What Are the Characteristics of Hydraulic Cylinders Used in Forklift Equipment?
Next : General Processes and Flows of Hydraulic Cylinder Manufacturing