ID Honed and OD Chrome Plated Tube
Model: E355、JIS STKM13C、SAE1026、SAE1020
Supplier: GOLDEN ASIA INDUSTRIAL CO., LTD.
ID honed / OD chrome plated tube undergoes two precision treatments on a single seamless tube: the bore is honed to H7–H9 tolerance for smooth piston motion and sealing, while the OD is hard chrome plated for corrosion and wear resistance. This dual treatment lets tube serve as both a cylinder barrel and the next stage's piston rod — the core component of multi-stage telescopic cylinders.
Highlights
- Dual-function, dual-treated tube — Honed ID serves as the cylinder barrel, chrome-plated OD serves as the next stage's piston rod, making it the key structural component in multi-stage telescopic cylinders
- ID tolerance H7–H9, Ra ≤ 0.2 µm — Low friction, long seal life, smooth piston motion
- OD hard chrome 15–20μm, HV850+ hardness — Thickness graded by diameter (below Ø22.225mm: min 15μm / Ø24mm and above: min 20μm), resisting corrosion, wear, and mechanical impact
- OD tolerance f7/f8 — Compatible with standard piston rod tolerance systems for assembly with other chrome tube components
- Straightness 1–1.2mm/1000mm, roundness 1/2 of tolerance — Maintains roundness and straightness under repeated telescopic movement and high pressure
- Standard ID Ø18–300mm— Covers long-stroke multi-stage telescopic cylinder needs
- Steel grades available —E355、JIS STKM13C、SAE1026、SAE1020, selectable by pressure rating and regional specification
- Built for heavy-duty mobile equipment — Dump trucks, refuse compactors, mobile cranes, agricultural machinery, marine lifting equipment
Specifications
| OD Tolerance | f7、f8 |
|---|---|
| OD Surface Roughness | max Ra 0.2μm |
| OD Hard Chrome Thickness | Below Ø22.225mm: min 15μm Ø24mm and above: min 20μm |
| ID Tolerance | H7、H8、H9 |
| ID Surface Roughness | max Ra 0.2μm |
| Roundness | 1/2 of tolerance |
| Straightness | 1~1.2mm/1000mm |
| Standard Internal Diameter | Φ18~300mm |
| Steel Grade | E355、JIS STKM13C、SAE1026、SAE1020 |
| Process | ID Honing + OD Hard Chrome Plating |
Technical Features
- Dual treatment eliminates the need for separate components — Honing the ID and chrome plating the OD on the same tube lets it function directly as the next stage's piston rod, simplifying the structural design and assembly of multi-stage telescopic cylinders without pairing separate barrel and rod parts
- OD chrome thickness graded by diameter — Different minimum chrome thickness standards by OD size (below Ø22.225mm: min 15μm / Ø24mm and above: min 20μm) ensure adequate corrosion and wear margin across all sizes
- Honed ID balances seal life and energy efficiency — H7–H9 tolerance and Ra ≤0.2 µm bore finish reduce fluid resistance and seal friction, lowering energy loss and extending seal service life
- Straightness and roundness control support repeated high-pressure extension/retraction — Even under repeated telescopic movement and variable loading, the tube maintains roundness and straightness, reducing uneven wear and leakage risk
- Higher cost, lower total maintenance burden — Dual-sided precision processing and chrome plating compliant with standards such as REACH raise initial manufacturing cost, but in space-constrained, high-pressure, harsh-environment applications this substantially reduces long-term maintenance frequency and total cost of ownership
- Commonly paired with other chrome tube components to complete a telescopic system — The ID honed/OD chrome tube serves as the moving inter-stage tube, paired with standard honed tube as the fixed base barrel and hard chrome plated rod as the final actuating stage, together forming a complete multi-stage telescopic cylinder
Related TagsChrome Tubechrome plated steel tubeID hoend OD chrome plated tubetelescopic cylinder componenthydraulic cylinder component