Hydraulic pipe

steelfor hydraulic systemsconstruction

Product Overview The 4140 Honed Tube is a precision hydraulic cylinder tube manufactured from 4140 steel for distributors, stockists and engineering companies. The honed bore provides low friction (Ra ≤ 0.4 µm) and tight diameter tolerances (H8–H10), delivering extended service life and reliable performance in mobile and industrial hydraulic systems. Available up to 13 m or cut to customer requirements. Tubes are produced under ISO 9001 and GL approvals.

Key Details

• Model: Honed Tube
• Brand: EAST AI
• Material: 4140 steel
• Length: Max. 13 m (customizable)
• ID tolerance: H8–H10
• Straightness: 0.5 mm / 1000 mm
• Application: Hydraulic cylinders for mobile equipment and industrial machinery
• Packing: Wooden cases
• Bore roughness: 0.1–0.4 µm (production capability to Ra ≤ 0.2 µm)

Production Process

• Raw material selection and chemical/mechanical inspection
• Cold drawing to improve finish and dimensional accuracy
• Honing to achieve required bore finish and tolerance
• Straightening to specified straightness tolerance
• Optional stress-relief heat treatment on request
• Final quality inspection with MTR and dimensional checks
• Packing in wooden cases for safe transport

Certificates and Quality Assurance

• ISO 9001 Quality Management System
• Germanischer Lloyd (GL) approval of material manufacturers (AMM)
• Material Test Reports (MTR) available
• Traceable inspection reports and compliance with hydraulic cylinder standards

Product Specifications Material: 4140 steel
Length: Up to 13 m or customized
Diameter tolerance: H8–H10
Bore finish: Ra ≤ 0.4 µm (capability to Ra ≤ 0.2 µm)
Straightness: 0.5 mm / 1000 mm
Outer diameter: customizable
Heat treatment: optional stress relief
Application: hydraulic cylinders, piston rod sleeves, industrial machinery

Applications

• Hydraulic cylinders for construction, agriculture and material handling
• Piston rod sleeves to reduce wear and ensure smooth operation
• Industrial machinery: presses, injection moulding and lifting equipment
• Custom engineering projects for heavy-duty hydraulic systems

Technical specifications

• Material: 4140 steel
• Length: Max. 13 m (custom lengths available)
• ID tolerance: H8–H10
• Bore finish (roughness): 0.1–0.4 µm (Ra ≤ 0.4 µm; capability to Ra ≤ 0.2 µm)
• Straightness: 0.5 mm per 1000 mm
• Outer diameter: customizable
• Heat treatment: optional stress relief
• Packing: wooden cases
• Intended application: hydraulic cylinders, piston rod sleeves, industrial machinery