Product description:

The honing pipe is a type of seamless steel pipe that has undergone honing processing for high precision and excellent surface quality. It is not a special material but a steel pipe product that achieves outstanding performance through specific advanced processing techniques.

A Cylinder honing tube—also known as a honed tube or hydraulic cylinder barrel—is a precision-engineered seamless steel tube that serves as the inner core of hydraulic and pneumatic cylinders. It provides the surface on which the piston moves, converting hydraulic or pneumatic pressure into linear motion. The honing process ensures a smooth, accurate internal surface, essential for minimizing friction, maintaining sealing performance, and extending the service life of hydraulic systems.

Pictures:

Material and Structure

Cylinder honing tubes are typically manufactured from high-quality carbon steel and alloy steel, such as ST52, E355, AISI 1020, AISI 1045, and AISI 4140, which offer outstanding mechanical strength, fatigue resistance, and machinability. In applications that demand superior corrosion resistance—such as marine, chemical, or food industries—stainless steel grades like AISI 304, 316, or 420 are often used.

The honing process creates a mirror-smooth internal surface (Ra ≤ 0.2 μm) with precise dimensional control (tolerance H7–H8). This precision finish ensures stable piston motion, reduces seal wear, and minimizes energy loss during operation. The tube’s outer surface can also be machined or polished to meet specific assembly or aesthetic requirements.

Manufacturing Process

The production of a cylinder honing tube combines advanced machining technology with strict quality control to ensure durability, accuracy, and consistency:

Raw Material Selection: Use seamless cold-drawn or hot-rolled steel tubes with uniform composition and fine microstructure.

Cold Drawing: Enhances dimensional accuracy and refines grain structure.

Heat Treatment: Normalizing, quenching, and tempering increase hardness, strength, and impact resistance.

Honing or Skiving & Roller Burnishing: Achieves a highly smooth inner surface with tight tolerances.

Outer Machining (Optional): External turning or polishing for precise fitting.

Surface Protection: Phosphating, oiling, or chrome plating prevents corrosion and extends service life.

Final Inspection: Each tube is tested for straightness, surface roughness, mechanical strength, and dimensional precision.

Key Features and Advantages

High Dimensional Accuracy: Precise inner diameter and straightness ensure optimal piston performance.

Ultra-Smooth Surface Finish: Reduces friction and seal wear for longer service life.

Superior Strength and Fatigue Resistance: Withstands high pressure and dynamic loads.

Excellent Roundness and Straightness: Ensures stable piston movement.

Corrosion Resistance: Optional coatings or stainless steel versions available.

Reliable Performance: Maintains smooth hydraulic motion under extreme operating conditions.

Long Lifespan: Minimizes maintenance and downtime in industrial applications.

Grinding tube production process:

Applications:

The hydraulic cylinder is an energy conversion device that converts hydraulic energy into mechanical energy. It is the core executive component in the hydraulic system. The hydraulic cylinder uses hydraulic oil to drive the piston to move, converting hydraulic energy into linear reciprocating motion. When the hydraulic oil enters the cylinder barrel, it pushes the piston rod to extend or retract, completing the predetermined action. The direction and speed of its movement are regulated by the hydraulic control system. The hydraulic cylinder consists of a cylinder barrel, cylinder cover, piston and piston rod, sealing device, and buffering device. According to its structure, it can be classified as piston type, plunger type, multi-stage telescopic sleeve type, and gear rack type. Hydraulic cylinders are widely used in machine tools, construction machinery, vehicles, and other fields, featuring a simple structure and smooth movement.

Cylinder honing tubes are widely used in hydraulic and pneumatic systems across multiple industries, including:

Hydraulic cylinders in construction, mining, and transportation equipment

Pneumatic cylinders for automation and robotics

Industrial machinery, including presses, injection molding machines, and material handling systems

Agricultural and forestry equipment such as harvesters, loaders, and tractors

Marine and offshore hydraulic systems exposed to corrosive conditions

Aerospace and defense hydraulic actuators requiring precision performance

These tubes perform reliably under continuous reciprocating motion and high-pressure oil flow, making them vital for modern power transmission and motion control systems.

Company profile:

Since its establishment in 2014, Wuxi Hengxin Zhicheng Co., Ltd. has rapidly grown into a leading enterprise in the steel manufacturing industry. We focus on the research, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders, and are committed to providing customers with high-quality, customizable products that fully meet diverse application needs.

Our products are exported to global markets such as the Middle East, South America, Africa, and Southeast Asia, and are highly trusted by large purchasers and customers in the steel industry. We always prioritize quality, reliability and customer service, and attach great importance to establishing long-term and stable cooperative relationships with customers. We provide each customer with tailor-made solutions.

We continuously promote technological innovation and improve service capabilities and production efficiency. Through an efficient online platform, you can browse our best-selling products at any time and communicate with the sales and support teams in real time to conveniently obtain the information you need. We sincerely invite partners from all countries to visit, exchange and provide guidance, and jointly explore more possible cooperation opportunities!

Certification:

Packaging and Transportation:

【Package standard】

We use steel bands to tightly package the products into hexagonal bundles. The structure is stable and not prone to deformation. Each bundle is equipped with two high-strength nylon straps to ensure the safety and convenience of the lifting operation.

To meet various maritime transportation needs, we offer a range of customized packaging options, including full coverage with oilcloth, moisture-proof wooden boxes, and high-strength protective frame packaging, to ensure the maximum safety of goods during transportation.

【Guarantee for transportation】

We offer 20-foot and 40-foot standard container transportation services. Each container can carry up to 25 tons of goods and we can accept trial orders with a minimum of 5 tons. This allows for flexible adaptation to your purchasing scale. All packaging complies with maritime shipping standards to ensure that the goods are delivered to the destination efficiently and safely.

Why us?

We focus on the research, development, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders. We have a complete production chain and an advanced equipment system, including piercing machines, cold drawing machines, hot rolling machines, high-precision flaw detection and testing equipment. The company has passed multiple authoritative certifications such as ISO9001, API, SGS, CCS, DNV, ABS, CE, RoHS, etc., ensuring that each product complies with international standards. We are committed to providing customers with high-quality, customizable solutions to meet diverse application needs.

Relying on our own built processing base and modern workshops, combined with multiple branches and storage centers across the country, we have achieved sufficient inventory and efficient logistics coordination, significantly shortening the delivery cycle and ensuring the rapid delivery of orders.

We have established a complete service and support system. After the order is signed, the professional after-sales team can provide timely and safe on-site guidance and technical support to ensure that customers are at ease throughout the process from procurement to use.

FAQ：

1. Do you support customized design and production?

Sure. We have a professional engineering team that can conduct customized design and production with special sizes, control systems or OEM according to your requirements.

2. How fast can you deliver?

In stock sizes, it takes 3-5 days. For customized sizes, it takes 30-35 days.

3. What payment methods do you support?

We support TT payment. Generally, 30% to 50% of the payment is made in advance, and the remaining amount is paid before shipment.

4. Can you provide material certification (MTC)?

Yes, we will provide MTC to you after production is completed to ensure that the material quality meets the standards.

5. What is the minimum order quantity?

Generally, we accept trial orders. The minimum order quantity is 1-3 tons, which can be determined according to different products.