Airtac SC50 Standard Cylinder SC50X138
The AirTAC Airtac SC50 Standard Cylinder SC50X138 is a genuine double-acting standard air cylinder with a Ø50mm bore and 138mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ50 mm
- Stroke138 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SC50 Standard Cylinder SC50X138
The SC50X138 is a 50 mm bore, 138 mm stroke double-acting pneumatic cylinder from the AirTAC SC tie-rod series. It generates 982 N of push force and 825 N of pull force when operated at 0.5 MPa, making it a capable mid-range actuator for general industrial automation tasks. The 20 mm diameter piston rod and 21 mm adjustable air cushion provide reliable deceleration at each end of the 138 mm travel.
With a compact body length A of just 150 mm, the total extended length is approximately 288 mm. This model uses the standard PT1/4 port thread and TPU seals, giving an operating temperature range of -20 to +70 °C. As a genuine AirTAC SC cylinder, it is a proven workhorse for clamping, pressing, and material transfer applications requiring a short, controlled stroke.
Airtac SC50 Standard Cylinder SC50X138 Technical Specifications
| Model | Airtac SC50 Standard Cylinder SC50X138 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 138 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 SC50X138
| SC | Standard tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×138 | 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 SC50X138 Is Used
Part Stops & Gates
The 138 mm stroke and 982 N push force at 0.5 MPa are ideal for raising and lowering part stops or diverting gates on conveyor lines, providing a positive, repeatable motion to control product flow.
Light Assembly Pressing
Delivers a controlled 1767 N of force at the maximum 0.9 MPa operating pressure, suitable for pressing bushings, bearings, or pins into light assemblies where a short, guided stroke is needed.
Clamping & Fixturing
Use the SC50X138 for pneumatic clamping in machining or welding fixtures. The 138 mm stroke provides ample retraction to clear the workpiece, while the 20 mm rod resists bending under clamping loads.
Is the Airtac SC50 Standard Cylinder SC50X138 the Right Cylinder?
Choose the SC50X138 when your application needs roughly 100 kgf of force in a compact footprint. If your load is lighter and you can accept a smaller actuator, stepping down to the 40 mm bore (SC40 series, 628 N push at 0.5 MPa) saves space and air consumption. For higher force requirements, the 63 mm bore (SC63 series) provides 1559 N at the same pressure.
This 138 mm stroke is well within the standard range for the 50 mm bore, so no special stroke considerations apply. When replacing an existing cylinder, match five key points: 50 mm bore, 138 mm stroke, PT1/4 port thread, basic (no bracket) mounting, and the absence of a magnet. Always confirm the rod thread (M16x1.5) and mounting hole pattern are identical to the unit being replaced.
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 SC50X138 FAQ
The theoretical push force is 982 N at 0.5 MPa, 1374 N at 0.7 MPa, and 1767 N at the maximum operating pressure of 0.9 MPa. The pull force on the return stroke is 825 N at 0.5 MPa due to the area reduction from the 20 mm piston rod. For kgf, the maximum theoretical force at 1.0 MPa is 200 kgf.
No. The AirTAC SC series is a tie-rod cylinder and is physically shorter than an ISO 15552 profile cylinder of the same bore and stroke. It is not dimensionally interchangeable with ISO 15552 mounts. It is a direct replacement only for another AirTAC SC50 tie-rod cylinder with the same stroke, port thread, and mounting configuration.
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