1. Product Overview

Seamless honed steel tube—also called honed cylinder tube or hydraulic honed tubing—is a precision steel pipe with a smooth inner bore, specially manufactured for hydraulic cylinder barrels. With tight tolerance and excellent roundness, it ensures efficient piston movement and reduced seal wear, making it essential in high-performance hydraulic systems.

2. Product Name

E355 Seamless Honed Tube for Hydraulic Cylinder

3. Size Range

• Inner Diameter (ID): 40mm – 580mm

• Wall Thickness (WT): Customized

4. Available Steel Grades

• SAE/AISI: SAE1020, SAE1026, SAE1045, SAE4130, SAE4140

• DIN: ST52, ST52.3, ST52.4

• EN: E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470

• GB: 20#, 45#, 16Mn, Q345B/C/D/E, 25Mn, 27SiMn

5. Manufacturing Methods

• Cold Rolled

• Hydraulic Cold Drawn

• Hot Rolled + Deep Hole Boring

6. Delivery Conditions

7. Bore Treatment Options

• Honed

• Skived & Roller Burnished (SRB)

8. Surface Roughness

• Honed Tubes: Ra ≤ 0.35 μm

• SRB Tubes: Ra ≤ 0.25 μm

9. Tolerance – H8 Class

10. End Finish

• Honed Tubes: Plain ends with square cuts, deburred

• SRB Tubes: Beveled ends (optional)

11. Packaging

• Bundles with steel strips

• Internal & external anti-rust oil coating

• Plastic caps for tube ends

• External PVC or woven bags

• Custom markings & export packing available

What’s the Difference Between Honed Tube and SRB Tube?

Both honed tubing and skived & roller burnished tubes are widely used in hydraulic cylinders. While honed tubes are processed using abrasive stones, SRB tubes go through skiving followed by roller burnishing. SRB delivers better surface finish and roundness, ideal for high-load systems.

Applications

• Hydraulic Cylinder Barrels

• Excavators, Loaders, Lifts

• Mobile Machinery

• Heavy Equipment

• Agricultural Equipment

• Marine Hydraulics

FAQs – Seamless Honed Hydraulic Tubes

• Q1: What’s the MOQ for honed tube orders?

• A: 2–3 tons/size for OD ≤ 250mm; 10 tons/size for OD > 250mm or special steel grades.

• Q2: Delivery time?

• A: 40–60 days. Raw material sourcing takes 15–30 days; honing requires 7–15 days depending on size.

• Q3: What’s the warranty period?

• A: 6 months after delivery. Inspection before shipment is welcomed.

• Q4: What payment terms do you support?

• A: T/T, L/C, D/P depending on buyer evaluation and creditworthiness.

• Q5: How do you ensure quality?

• A: Raw materials come from certified mills. Each production stage is subject to strict inspection—dimensional, surface, and mechanical.

Company Profile

We are a leading honed tube manufacturer in China, specializing in cold drawn seamless tubes and hydraulic honed tubing since 2002. With 12 workshops across 32,000m² and full in-house production (cold drawing, heat treating, honing/SRB, machining), we serve top hydraulic brands including:

• KYB Japan

• DY Power Korea

• And more OEM clients worldwide

We also offer CNC turning and custom hydraulic cylinder tube machining based on customer drawings.