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CK45 Honed Tube

The CK45 Honed Tube is a precision‐finished hydraulic cylinder tube manufactured from high-quality medium carbon steel CK45. Known for its excellent mechanical strength and high wear resistance, CK45 is one of the most widely used materials for hydraulic cylinder barrels.
A honed tube undergoes internal honing and polishing to achieve an exceptionally smooth surface finish with accurate dimensional tolerances (typically H8/H9).
This ensures superior sealing performance, lower friction, and long service life in hydraulic and pneumatic systems.
EASTAI’s CK45 Honed Tubes are produced using advanced cold drawing and honing equipment, ensuring consistent quality for demanding hydraulic applications.

  • Model:Honed Tube

  • Brand:EAST AI

  • Material:CK45

  • Length:Max. 13m

  • ID Tolerance:H8~H10

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

  • Packing:Wooden cases

Product Description

Chemical Composition of CK45 Steel

Element

Content (%)

Carbon (C)

0.42–0.50

Manganese (Mn)

0.50–0.80

Silicon (Si)

0.10–0.40

Sulphur (S)

≤ 0.035

Phosphorus (P)

≤ 0.035

CK45 steel is well‐known for its combination of strength, impact resistance, and good machinability, making it an excellent material for hydraulic cylinder tubes.


Key Features of CK45 Honed Tube

EASTAI’s CK45 Honed Tubes are engineered for high precision and durability, ensuring reliable performance under demanding operating conditions.

Main Features:

  • High Strength Material — CK45 provides strong mechanical properties suitable for heavy-duty cylinders

  • Excellent Surface Finish — Ra ≤ 0.4 μm after honing

  • Precision ID Tolerance — Typically within H8/H9

  • Improved Sealing Performance — Smooth surface ensures longer seal life

  • Straightness Control — ≤ 0.5 mm/1000 mm

  • High Wear Resistance — Suitable for high-pressure hydraulic systems

  • Available in Metric and Imperial Sizes



CK45 Honed Tube Specifications

Specification

Description

Material

CK45 / SAE1045 / C45

Manufacturing Method

Cold Drawn + Honed + SRB (Optional)

ID Tolerance

H8 / H9

Roughness

Ra ≤ 0.4 μm

Straightness

≤ 0.5 mm/1000 mm

Outer Diameter

30 mm – 400 mm

Inner Diameter

20 mm – 350 mm

Wall Thickness

Customized

Length

Up to 12 meters

Standards

DIN 2391, EN 10305-1, ASTM A519



Manufacturing Process of CK45 Honed Tube

EASTAI applies a strict and fully controlled production process to ensure the highest precision of each CK45 honed tube.

  1. Material Selection — High-quality CK45 seamless steel tubes

  2. Cold Drawing — Improves dimensional accuracy and surface quality

  3. Normalizing / Stress Relief — Enhances stability and mechanical properties

  4. Honing or Skiving & Roller Burnishing (SRB) — Achieves mirror-like surface finish

  5. Precision Measurement — Checks ID tolerance, surface roughness, roundness, straightness

  6. Cleaning & Anti-Rust Treatment

  7. Final Inspection & Packaging

Every tube is tested according to ISO9001 quality standards before shipment.



Applications of CK45 Honed Tube

CK45 Honed Tubes are widely used in hydraulic and mechanical systems requiring high precision and durability.

Typical application fields include:

  • Hydraulic cylinder barrels

  • Pneumatic cylinder tubes

  • Construction machinery

  • Agricultural equipment

  • Lifting and material handling systems

  • Mining and drilling equipment

  • Industrial automation machinery

  • Machine tools and mechanical components

With excellent performance under high pressure, CK45 honed tubing is a preferred choice for hydraulic engineers.



Advantages of EASTAI CK45 Honed Tube

Advantage

Description

Excellent Surface Precision

Ensures low friction and extended seal life.

High Pressure Resistance

Suitable for heavy-duty hydraulic applications.

Strong Material Properties

CK45 steel provides strength and fatigue resistance.

Wide Size Range

Supports multiple sizes for global hydraulic systems.

Strict Quality Control

100% inspection on ID roughness, tolerance, and straightness.

OEM/ODM Friendly

Customized sizes and machining available.


Packaging and Delivery

EASTAI ensures safe and professional packing for all honed tubes.

Packaging: Anti-rust oil, plastic film, woven bag, wooden cases or steel pallets

Delivery Time: 20–30 days after order confirmation

Shipping: Sea, air, railway, or multimodal transport

Export Markets: Europe, Russia, Southeast Asia, South America, Middle East


Why Choose EASTAI for CK45 Honed Tubes

EASTAI is a professional hydraulic components manufacturer with:

  • 19 years of industry experience

  • 25,000 tons annual production capacity

  • Advanced honing and SRB equipment

  • Strict ISO9001 quality management

  • Complete hydraulic product lines: honed tubes, chrome plated bars, hydraulic cylinders, hydraulic power units

Whether you need standard sizes or customized solutions, EASTAI provides reliable quality and fast delivery.


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