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4140 Honed Tube

The 4140 Honed Tube is a high-quality hydraulic cylinder tube designed for distributors, stockists, and engineering companies. Manufactured from premium 4140 steel, this tube features a smooth bore surface (Ra ≤ 0.4 µm) and precise diameter tolerances (H8~H10), ensuring reduced friction, long service life, and optimal performance in hydraulic systems.
Available in lengths up to 13 meters or customized to meet specific project requirements, the 4140 Honed Tube is ideal for hydraulic cylinders, piston rod sleeves, and industrial machinery applications. Each tube undergoes a rigorous production process including cold drawing, honing, straightening, and optional stress-relief heat treatment, backed by ISO 9001 and GL certifications.

  • Model:Honed Tube

  • Brand:EAST AI

  • Material:4140

  • Length:Max. 13m

  • ID Tolerance:H8~H10

  • Straightness:0.5/1000

  • Application:Hydraulic cylinders for mobile equipment, industrial machinery, and heavy-duty systems

  • Packing:Wooden cases

  • Roughness:0.1-0.4μ

Product Description

4140 Honed Tube Production Process

The 4140 Honed Tube undergoes a meticulous production process to ensure smooth internal surfaces, precise tolerances, and enhanced durability. The key production steps include:

  1. Raw Material Selection 

    High-quality 4140 steel is sourced and inspected for chemical composition and mechanical properties.

  2. Cold Drawing 

    The steel tubes are cold-drawn to improve surface finish, dimensional accuracy, and mechanical strength.

  3. Honing

    Advanced honing machines are used to achieve smooth bore surfaces (Ra ≤ 0.2 µm) and precise diameter tolerances (H8~H10). This process reduces friction and extends the lifespan of hydraulic components.

  4. Straightening

    Precision straightening machines ensure tube straightness within ≤0.2 mm per 1000 mm.

  5. Heat Treatment (Optional)

    Depending on client requirements, tubes can be stress-relieved to improve dimensional stability.

  6. Quality Inspection

    Each tube is inspected for bore finish, roundness, straightness, and diameter consistency.

  7. Packaging & Storage

    Tubes are carefully packaged to avoid damage during transport and stored in our inventory for quick dispatch.


4140 Honed Tube Certificates and Quality Assurance

EASTAI’s 4140 Honed Tube meets global quality standards. Our certifications include:

ISO 9001 Quality Management System

Germanischer Lloyd (GL) Approval of Material Manufacturers (AMM)

Material Test Reports (MTR) available upon request

Compliance with international hydraulic cylinder standards

Every honed tube is traceable and comes with a detailed inspection report, ensuring consistent quality for distributors and engineering companies.


4140 Honed Tube Product Specifications

Our 4140 Honed Tube is engineered to meet diverse hydraulic cylinder requirements. Technical specifications include:


Parameter

Specification

Material

4140 Steel

Length

Up to 13 meters or customized

Diameter Tolerance

H8~H10

Bore Finish

Ra ≤ 0.4 µm

Straightness

0.5mm / 1000 mm

Outer Diameter

Customizable

Heat Treatment

Optional Stress Relief

Application

Hydraulic Cylinder, Piston Rod, Industrial Machinery



4140 Honed Tube Product Applications

The 4140 Honed Tube is widely used across industries where hydraulic systems require precision and durability:

Hydraulic Cylinders 

For construction, agricultural, and material handling equipment.

Piston Rod Sleeves 

Ensures smooth operation and reduces wear.

Industrial Machinery

Presses, injection molding machines, and lifting equipment.

Engineering Projects

Custom hydraulic systems in heavy-duty applications.


4140 Honed Tube Inventory and Supply

EASTAI maintains a large inventory of 4140 Honed Tubes to support distributors, stockists, and engineering companies. We offer:

Flexible length and diameter options

Fast delivery and global shipping

Competitive pricing for bulk orders

Custom fabrication services for special hydraulic cylinder projects


4140 Honed Tube Product Details

Our 4140 Honed Tube is designed for high performance:

Smooth Bore Surface 

Reduces friction and wear on piston rods.

High Dimensional Accuracy 

Ensures perfect fit in hydraulic cylinders.


Durable Material

4140 steel provides high tensile strength and fatigue resistance.


Customizable Options

Tailored to specific application requirements, including bore diameter, wall thickness, and length.



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