Airtac SC50 Standard Cylinder SC50X20H
The AirTAC Airtac SC50 Standard Cylinder SC50X20H is a genuine double-acting standard air cylinder with a Ø50mm bore and 20mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ50 mm
- Stroke20 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SC50 Standard Cylinder SC50X20H
The SC50X20H is a short-stroke double-acting pneumatic cylinder from the AirTAC SC tie-rod series, equipped with high-temperature Viton (FKM) seals that shift the operating range to 0–150 °C. With a 50 mm bore and 20 mm stroke, it delivers 982 N of push force at 0.5 MPa, ideal for hot-environment clamping, ejecting, or positioning tasks.
This model uses a 20 mm diameter piston rod with M16x1.5 male threads and PT1/4 ports. The adjustable air cushion (21 mm length) decelerates the piston smoothly at end-of-stroke, while the compact body length A of 150 mm plus the 20 mm stroke keeps the overall footprint minimal for tight machinery spaces.
Airtac SC50 Standard Cylinder SC50X20H Technical Specifications
| Model | Airtac SC50 Standard Cylinder SC50X20H |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (approx.) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SC50 Standard Cylinder SC50X20H
| SC | Standard tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×20 | 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 SC50 Standard Cylinder SC50X20H Is Used
Hot Press & Molding
Viton seals allow the SC50X20H to operate reliably inside heated platen presses, thermoforming tools, and rubber molding machines where ambient temperatures reach up to 150 °C.
High-Temp Part Ejection
Delivers a compact 20 mm stroke with 982 N of push force at 0.5 MPa to eject hot plastic or metal parts from molds and dies without seal degradation.
Autoclave & Sterilization Fixtures
Suitable for short-stroke clamping and positioning inside autoclaves and sterilization chambers, where the FKM seals withstand repeated high-temperature cycles.
Is the Airtac SC50 Standard Cylinder SC50X20H the Right Cylinder?
For applications requiring a 50 mm bore in high-temperature environments, the SC50X20H with Viton seals is the correct choice. If ambient temperatures stay below 70 °C, the standard TPU-seal SC50X20 offers a more economical alternative. Should you need higher force, stepping up to a 63 mm bore provides 1559 N at 0.5 MPa; for a lighter, more compact solution, the 40 mm bore delivers 628 N.
When replacing this cylinder, match five key points: 50 mm bore, 20 mm stroke, PT1/4 port thread, the basic (no bracket) mounting configuration, and the Viton seal material for sustained operation up to 150 °C. This tie-rod design is dimensionally shorter than an ISO 15552 cylinder and is not interchangeable with that standard.
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 SC50 Standard Cylinder SC50X20H FAQ
At 0.5 MPa the cylinder pushes with 982 N and pulls with 825 N. At 0.7 MPa the push force rises to 1374 N, and at the maximum operating pressure of 0.9 MPa it reaches 1767 N. The theoretical maximum at 1.0 MPa is 200 kgf.
No. The SC50X20H is a double-acting cylinder that requires continuous air pressure to maintain position. If pressure is lost or the directional valve is centered, the piston will drift or drop. For load holding without live pressure, add an external rod lock or a pilot-operated check valve.
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