China Manufacture H9 Honed Tubes for Hydraulic Cylinders

Honed tubes, with their high precision, smooth inner surface, excellent straightness, high hardness, wear resistance, corrosion resistance, and strong load-bearing capacity, are the ideal choice for hydraulic/pneumatic cylinders.

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Description

Honed tubes are widely used in hydraulic/pneumatic cylinders, engineering machinery, automotive parts, industrial valves, precision machinery, and textile equipment for reliable fluid transmission and mechanical motion.

Product Name	Honed Tube (also known as Hydraulic/Pneumatic Cylinder Honed Tube)
Material	Carbon steel: ST52, ST52.3, CK45, E355, 16Mn, SAE 1020, SAE 1026, SAE 1045, 4140, 42CrMo, SCM440
Specification Range	1. Inner Diameter (ID): 18mm – 1500mm 2. Outer Diameter (OD): 20mm – 1600mm (matching the inner diameter with wall thickness 3mm – 50mm) 3. Imperial specification: 1.5″ – 14.0″ ID, 1/8″ – 1″ wall thickness
Accuracy Range	1. Inner diameter tolerance: ISO H7, H8, H9 2. Straightness: ≤0.5/1000 3. Surface roughness (Ra): 0.2μm – 0.8μm 4. Wall thickness eccentricity: 10% – 15% max
Hardness Range	1. Carbon steel series: ≥B75 (SAE 1020), ≥B80 (ST52.3, SAE 1026) 2. Special treated type: ≥HV800 (hard chrome plated inner diameter type)
Tensile strength	Carbon steel ≥52kg/mm²
Manufacturing Process	1. Basic processes: Hot rolled, Cold drawn, Seamless blank preparation 2. Core processes: Honing; Optional processes: Skiving & Roller Burnishing (SRB), Normalizing treatment, Hard chrome plating, Anodizing 3. Quality control processes: Straightening, Precision grinding, Surface cleaning
Length	1. Fixed length: 1m, 2m, 3m – 8m (standard), maximum length up to 20m 2. Customized length: Cuttable according to customer requirements
Packaging	1. Surface protection: Anti-rust oil coating on internal and external surfaces, plastic caps sealed at both ends 2. Bundling way: Bundled with steel strips, wrapped with PE film 3. Special packaging: Wooden cases for long-distance transportation or high-precision products
Delivery Time	1. Standard order: 30 – 45 working days after order confirmation 2. Sample order: 15 working days after sample confirmation 3. Bulk order with customized specifications: 45 – 60 working days (subject to order quantity and customization complexity)