As a professional manufacturer of cylinder tube and rods, The production of DIN2391 honed tubes begins with selecting premium-grade steel of E355 ST52, renowned for its strength and durability. Through a specialized honing process, the inner surface of the tube undergoes controlled abrasion, achieving an ultra-smooth finish with consistent diameter tolerances. This process eliminates microscopic imperfections, creating a mirror-like surface that minimizes friction between the cylinder barrel and piston. Advanced honing technology ensures evenly spaced crosshatch patterns on the tube’s interior. This design not only optimizes lubrication retention but also prevents fluid leakage—a key factor in maintaining hydraulic system efficiency.
Every honed tube undergoes rigorous inspection to meet global industry standards. State-of-the-art equipment measures critical parameters such as:
Surface roughness of 0.2-0.4 um/mm
Straightness and roundness ≤ 0.5/1000mm
Hardness and tensile strength
Our multi-stage quality assurance process guarantees that each hydraulic cylinder tube delivers unmatched dimensional accuracy and structural integrity, even in high-pressure environments.
Why Choose Our DIN2391 Honed Tubes?
Superior Material Selection: Only ASTM-certified steel is used, ensuring corrosion resistance and load-bearing capacity.
Customized Solutions: Tubes are available in varied sizes (ID 20mm to 600mm) and lengths, tailored to your hydraulic cylinder requirements.
Eco-Friendly Manufacturing: Our closed-loop honing system recycles coolant, aligning with sustainable production practices.
