Linear Shaft / Bearing Rod
Model: JIS SUJ2, C53G, CF53, S55C
Supplier: GOLDEN ASIA INDUSTRIAL CO., LTD.
SUJ-2 precision linear shaft is a bearing rod heat-treated to HRC60±2 surface hardness, designed to serve as a smooth, low-friction guide rail for linear bearings and sliders — not to transmit hydraulic axial force. It prioritizes extreme surface hardness, dimensional precision, and low-friction sliding, making it a standard component in CNC machinery, robotics, automation, and medical equipment.
Highlights
- Surface hardness up to HRC60±2 — Far exceeds typical hard chrome piston rods, offering superior wear resistance and dimensional stability
- Surface roughness ≤ Ra0.2μm — Precision ground and polished for smooth, low-friction sliding
- OD tolerance g6, roundness 1/2 of tolerance — Ensures tight fit with linear bearings and precise motion
- Precise straightness — Max 0.25mm/1000mm below Φ20mm, max 0.2mm/1000mm at Φ20mm and above
- Optional hard chrome layer — Min 10μm below Φ22.225mm, min 15μm at Φ24mm and above, for added corrosion resistance
- Steel grades: JIS SUJ2, C53G, CF53, S55C — Bearing/high-carbon steel series, custom grades available
- Size range Φ8–160mm, standard length 2M–6M
Application Scenarios Pneumatic cylinder control in automated production linesMachine ToolsAutomation Lines
Specifications
| OD Tolerance | g6 |
|---|---|
| Surface Roughness | Ra 0.2μm max |
| Surface Hardness | HRC 60 ± 2 |
| Hard Chrome Thickness | Below Φ22.225mm: min 10μm Φ24mm and above: min 15μm |
| Straightness | Below Φ20mm: max 0.25mm/1000mm Φ20mm and above: max 0.2mm/1000mm |
| Roundness | 1/2 of tolerance |
| Standard Length | 2M~6M |
| Standard Size | Φ8~160mm |
| Steel Grade | JIS SUJ2, C53G, CF53, S55C |
Technical Features
- Extreme surface hardness improves wear resistance — HRC60±2 hardness prevents abrasive damage during constant sliding contact with bearings
- High dimensional stability — Uniform microstructure keeps the shaft's exact shape under mechanical stress, essential for smooth, precise motion
- Withstands heavy loads without deformation — High hardness supports heavy-duty automation tasks without shape distortion
- Fine-ground, polishable surface — Low roughness minimizes friction and improves seal compatibility
- CNC Machinery — Guides cutting heads, tables, or tool carriages with high precision for accurate machining
- Robotics & Automation — Enables smooth, repeatable positioning in robotic arms and automated assembly lines
- Medical Equipment — Used in diagnostic devices, surgical robots, and imaging equipment requiring clean, reliable motion
- Printing & Packaging — Ensures seamless material transport and accurate positioning
Related TagsLinear shaftinglinear shaftbearing rodSUJ2hydraulic cylinder componentpneumatic cylinder component