Airtac SC50 Standard Cylinder SC50X18
The AirTAC Airtac SC50 Standard Cylinder SC50X18 is a genuine double-acting standard air cylinder with a Ø50mm bore and 18mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ50 mm
- Stroke18 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SC50 Standard Cylinder SC50X18
The SC50X18 is a compact-stroke double-acting pneumatic cylinder from the AirTAC SC tie-rod series. With a 50 mm bore and 18 mm stroke, it produces a push force of 982 N at 0.5 MPa and up to 1767 N at the maximum operating pressure of 0.9 MPa, driven by a 20 mm diameter piston rod.
This model features a body length A of 150 mm, resulting in a short overall extended length for tight installations. The adjustable pneumatic cushion at each end (21 mm cushion length) decelerates the piston smoothly, and the standard PT1/4 port thread ensures straightforward plumbing. This is a basic configuration with TPU seals and no magnet, suitable for general industrial actuation.
Airtac SC50 Standard Cylinder SC50X18 Technical Specifications
| Model | Airtac SC50 Standard Cylinder SC50X18 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 18 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 SC50X18
| SC | Standard tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×18 | 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 SC50X18 Is Used
Short-Stroke Clamping
The 18 mm stroke and 982 N force at 0.5 MPa make this cylinder ideal for compact clamping and holding fixtures in machining centres, where space is limited and rapid cycling is required.
Part Stops and Ejectors
Deploy the SC50X18 as a pneumatic stop gate or ejector on small conveyor lines. Its short stroke provides a quick, decisive push to divert or separate lightweight components.
Press-Fit Assembly Tools
Use this cylinder in benchtop assembly stations for pressing bearings, pins, or bushings. The controlled 18 mm stroke and adjustable cushioning protect parts from impact damage during the insertion cycle.
Is the Airtac SC50 Standard Cylinder SC50X18 the Right Cylinder?
For applications requiring slightly more force, the 63 mm bore SC63 series provides 1559 N at 0.5 MPa, while the 40 mm bore SC40 delivers 628 N if a smaller footprint is needed. This 18 mm stroke is well within the standard range for the 50 mm bore, which supports strokes up to 1200 mm.
When replacing an existing cylinder, match five key points: 50 mm bore, 18 mm stroke, PT1/4 port thread, the basic (no bracket) mounting configuration, and the absence of a magnetic piston. This ensures a direct dimensional and performance swap for another AirTAC SC50 tie-rod unit.
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 SC50X18 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. The theoretical maximum force at 1.0 MPa is 200 kgf. These values assume a standard double-acting configuration with a 20 mm rod.
No. The SC50X18 is a double-acting cylinder and does not lock or hold position when air pressure is exhausted or the directional valve is centred. The piston will drift or drop under load. If load holding is required without live pressure, you must add an external mechanical lock, a rod brake, or a pilot-operated check valve.
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