Airtac SC50 Standard Cylinder SC50X125SN
The AirTAC Airtac SC50 Standard Cylinder SC50X125SN is a genuine double-acting standard air cylinder with a Ø50mm bore and 125mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ50 mm
- Stroke125 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SC50 Standard Cylinder SC50X125SN
The SC50X125SN is a double-acting pneumatic cylinder with a 50 mm bore and 125 mm stroke, built with nitrile (NBR) seals for reliable performance in standard industrial environments. It generates 982 N of push force at 0.5 MPa and 1767 N at 0.9 MPa, making it a capable mid-range actuator for pressing, clamping, and material-transfer tasks.
This model uses a 20 mm diameter piston rod with M16x1.5 male threads and PT1/4 ports. The adjustable air cushion at each end (21 mm length) decelerates the piston smoothly, reducing end-of-stroke impact. The body length A is 150 mm, giving a total extended length of approximately 275 mm.
Airtac SC50 Standard Cylinder SC50X125SN Technical Specifications
| Model | Airtac SC50 Standard Cylinder SC50X125SN |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 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 SC50X125SN
| SC | Standard tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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 SC50X125SN Is Used
Part Stops & Diverters
The 125 mm stroke and 982 N push force at 0.5 MPa reliably stop or divert medium-weight packages on belt conveyors without damaging the product.
Clamping Fixtures
Delivers consistent clamping force for CNC machining fixtures and welding jigs, holding workpieces securely during automated operations.
Press-Fit Assembly
Used in benchtop assembly stations to press bearings, bushings, or pins into housings, where controlled force and a clean pneumatic supply are required.
Is the Airtac SC50 Standard Cylinder SC50X125SN the Right Cylinder?
The SC50 bore suits applications needing 500–1000 N of force at typical shop air pressures. If your load exceeds 900 N at 0.5 MPa, consider stepping up to the SC63 bore, which provides 1559 N push force at the same pressure. For lighter, faster-moving loads, the SC40 bore delivers 628 N and may reduce air consumption.
When replacing an existing cylinder, match five points: 50 mm bore, 125 mm stroke, PT1/4 port thread, basic (no bracket) mounting, and the absence of a magnet. This NBR-sealed variant is suited for environments where the standard TPU seal is not specified; verify seal material compatibility with your operating fluid and temperature range.
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 SC50X125SN FAQ
At 0.5 MPa, push force is 982 N and pull force is 825 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N. The theoretical maximum at 1.0 MPa is 200 kgf.
Yes, dimensionally it is identical. The NBR (nitrile) seal offers good resistance to oils and greases but has a narrower low-temperature limit than TPU. Ensure your operating temperature and media are compatible with NBR before substituting.
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