Airtac SC40 Standard Cylinder SC40X178S
The AirTAC Airtac SC40 Standard Cylinder SC40X178S is a genuine double-acting standard air cylinder with a Ø40mm bore and 178mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ40 mm
- Stroke178 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SC40 Standard Cylinder SC40X178S
The SC40X178S is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, combining a 40 mm bore with a 178 mm stroke. At 0.5 MPa air pressure it produces 628 N of push force and 528 N of pull force, while at the maximum operating pressure of 0.9 MPa the extending thrust reaches 1130 N — a capable mid-range actuator for general automation.
This model carries the -S magnet suffix, meaning a built-in magnet is fitted on the piston. This allows CMSG, DMSG, or EMSG reed and solid-state sensors to be clamped directly onto the barrel for non-contact position sensing. The 16 mm diameter piston rod features an M12x1.25 thread, the ports are PT1/4, and the adjustable air cushion at each end provides a 21 mm deceleration zone to soften end-of-stroke impact.
Airtac SC40 Standard Cylinder SC40X178S Technical Specifications
| Model | Airtac SC40 Standard Cylinder SC40X178S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 178 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (approx.) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SC40 Standard Cylinder SC40X178S
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×178 | 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 SC40 Standard Cylinder SC40X178S Is Used
Material Handling Gates
The 178 mm stroke and 628 N push force at 0.5 MPa suit diverting or stopping medium-weight packages on conveyor lines. The built-in magnet enables reliable end-of-stroke sensing for high-cycle sorting.
Clamping & Fixturing
Delivers a controlled 1130 N clamping force at 0.9 MPa for CNC jigs and welding fixtures. The 21 mm adjustable air cushion protects tooling from shock at the end of the clamping stroke.
Press & Assembly Stations
Ideal for light press-fit or adhesive-cure holding operations. The M12x1.25 rod thread mounts standard tooling, and the magnet allows the control system to confirm full extension before the next cycle.
Is the Airtac SC40 Standard Cylinder SC40X178S the Right Cylinder?
For applications needing slightly more force, stepping up to the 50 mm bore SC50 series raises push force at 0.5 MPa from 628 N to 982 N. If a shorter overall length is required, the 32 mm bore SC32 series offers 402 N at 0.5 MPa in a more compact body. All standard strokes up to 1200 mm are available for the 40 mm bore.
When replacing an existing cylinder, match five key points to ensure drop-in compatibility: 40 mm bore, 178 mm stroke, PT1/4 port thread, the built-in magnet (-S suffix), and the basic (no bracket) mounting configuration. The SC is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profile cylinders.
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 SC40 Standard Cylinder SC40X178S FAQ
At 0.7 MPa supply pressure the push (extending) force is 879 N and the pull (retracting) force is 528 N. The maximum operating pressure is 1.0 MPa, giving a theoretical push force of 128 kgf. Always size the cylinder using the force at your actual working pressure.
Yes. The -S suffix in SC40X178S indicates a built-in magnet on the piston. You can clamp AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors onto the barrel tie-rods to detect piston position without additional brackets.
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