Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H
The AirTAC Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H is a genuine double-acting standard air cylinder with a Ø200mm bore and 70mm stroke, PT3/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ200 mm
- Stroke70 mm
- Port sizePT3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 33 mm
About the Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H
The SC200X70H is a large-bore double-acting tie-rod cylinder fitted with high-temperature Viton (FKM) seals, extending its operating range to 0–150 °C. With a 200 mm bore and 70 mm stroke, it generates a substantial 15708 N of push force at 0.5 MPa (28274 N at the 0.9 MPa maximum operating pressure), making it suitable for short-throw, high-force pressing or clamping in hot environments.
This model uses a 40 mm diameter piston rod with an M36x2 knuckle thread and PT3/4 porting. The adjustable air cushion (33 mm length) decelerates the piston smoothly, while the 244 mm body length A keeps the overall footprint compact for its force class. The cylinder is not ISO 15552 interchangeable; it matches AirTAC SC200 tie-rod dimensions and mounting patterns.
Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H Technical Specifications
| Model | Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø200 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | PT3/4 |
| Rod thread | M36×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 33 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (approx.) | 3204 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H
| SC | Standard tie-rod cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H Is Used
High-Temperature Pressing
Viton seals allow the SC200X70H to operate in ambient temperatures up to 150 °C, ideal for hot-press platens, autoclave door actuation, or foundry mould clamping where standard seals would degrade.
Heavy Clamping & Holding
With 15708 N of force at 0.5 MPa, this cylinder delivers the power needed for heavy-duty workpiece clamping, die-casting ejection, or structural testing fixtures requiring a short, controlled stroke.
Aggressive Environment Actuation
The FKM seal material resists many chemicals and high heat, making this cylinder a reliable choice for actuating valves, dampers, or gates in chemical processing lines or engine test cells.
Is the Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H the Right Cylinder?
Choose the SC200 bore when your application needs roughly 15700 N of push force at standard plant air pressure. If you can work with about 10053 N, stepping down to the SC160 bore reduces air consumption and physical size. For strokes longer than 300 mm on this 40 mm rod, evaluate side-load moments carefully—an external guide or guided cylinder is recommended to protect the rod bearing from bending stress.
For a direct replacement, match five points: 200 mm bore, 70 mm stroke, PT3/4 port thread, basic mounting (no brackets), and the -S magnet option if your original cylinder has a magnet. This H-suffix model is specifically for high-temperature service; do not substitute a standard TPU-seal cylinder in applications exceeding 70 °C.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SC200-250 Tie-Rod Cylinder Aluminum Alloy SC200X70H FAQ
At 0.7 MPa supply pressure, the SC200X70H double-acting cylinder produces 21991 N of push force on the piston. The pull force on the retract stroke is 15080 N at 0.5 MPa due to the 40 mm rod area. Always size the cylinder based on the force required at your specific operating pressure.
Yes, the SC200X70H is a direct dimensional drop-in for a standard SC200X70. The only difference is the Viton (FKM) seal material, which upgrades the temperature rating from -20–70 °C to 0–150 °C. Ensure your application's temperature falls within this range, as Viton seals may not be suitable for very cold starts below 0 °C.
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