Airtac AIRTAC SC125-160 Standard Cylinder SC125X20S
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X20S is a genuine double-acting standard air cylinder with a Ø125mm bore and 20mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke20 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X20S
The AirTAC SC125X20S is a double-acting single-rod pneumatic cylinder with a 125 mm bore and a 20 mm standard stroke, factory-equipped with a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors. At 0.5 MPa air pressure it generates 6136 N pushing force and 5734 N pulling force, putting it in the 6 kN class for robust clamping and short-throw actuation.
This model uses a 32 mm diameter piston rod with M27×2 male threads and PT1/2 ports. The total extended body length is approximately 223 mm (body length A of 203 mm plus 20 mm stroke). Its adjustable pneumatic cushion (28 mm length) decelerates the piston at end-of-travel, protecting the end caps during high-cycle short-stroke work.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X20S Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X20S |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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, 28 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (approx.) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac AIRTAC SC125-160 Standard Cylinder SC125X20S
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | 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 AIRTAC SC125-160 Standard Cylinder SC125X20S Is Used
High-Force Clamping
Delivers over 6 kN at 0.5 MPa to securely hold workpieces in CNC fixtures, welding jigs, and assembly presses where a short, powerful stroke is ideal.
Part Ejection & Stops
The 20 mm stroke with magnetic piston sensing confirms extend/retract position for reliable part ejection, diverting, or end-stop gates on conveyors.
Short-Stroke Pressing
Suitable for light press-fit insertion, riveting, or staking operations requiring a compact cylinder with sensor feedback for cycle verification.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X20S the Right Cylinder?
Choose the SC125 bore when your application needs around 6000 N of force at standard plant pressure; if you can accept roughly 3900 N, stepping down to the SC100 bore reduces air consumption and physical size. For strokes this short, side loading is rarely the primary concern, but always align the rod axially with the load to prevent premature bearing wear. When replacing an existing cylinder, match five points: 125 mm bore, 20 mm stroke, PT port thread, the built-in magnet (-S suffix), and the basic (no bracket) mounting configuration.
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 AIRTAC SC125-160 Standard Cylinder SC125X20S FAQ
At 0.5 MPa the push force is 6136 N and the pull force is 5734 N. At the maximum operating pressure of 0.9 MPa, push force reaches 11045 N. The theoretical maximum at 1.0 MPa is 1251 kgf.
Yes. The -S suffix denotes a built-in magnet in the piston, so AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors clamp directly onto the tie-rod barrel to detect piston position without additional brackets.
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