The AirTAC Airtac SC40 Standard Cylinder SC40X25LB is a genuine double-acting standard air cylinder with a Ø40mm bore and 25mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X25LB is a double-acting tie-rod cylinder with a 40 mm bore and a short 25 mm stroke, ideal for compact clamping, ejecting, or positioning tasks. It delivers 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa) and features a 16 mm diameter piston rod with M12x1.25 male threads.
This model is factory-configured with LB axial foot mounts (part code F-SC40LB), bolting the cylinder body directly to a machine surface for stable, linear actuation. The cylinder body length A is 142 mm, and the standard PT1/4 ports and adjustable air cushion ensure controlled deceleration even in rapid short-stroke cycles.
| Model | Airtac SC40 Standard Cylinder SC40X25LB |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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.
| 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.
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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.
The 25 mm stroke and foot mounting make it a direct fit for conveyor part stops, where a short, rigid linear motion diverts or halts product flow.
With 628 N of force at standard line pressure, the SC40X25LB securely clamps workpieces in machining or welding fixtures, with the LB feet providing a stable bolted base.
The short body and 25 mm stroke suit tight-space ejector mechanisms on packaging or assembly machines, where the 16 mm rod resists buckling under axial loads.
For applications needing a compact 40 mm bore with surface mounting, the SC40X25LB is ready to install. If you require higher force, step up to the SC50 series which provides 982 N at 0.5 MPa. For lower force and a lighter footprint, the SC32 series offers 402 N.
When replacing an existing cylinder, match five key points: 40 mm bore, 25 mm stroke, PT1/4 port thread, LB foot mounting, and the absence of a magnet. This is a tie-rod cylinder, so it is not dimensionally interchangeable with ISO 15552 profile cylinders.
Quick checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
The SC40X25LB comes with the LB foot mounts attached. If you need a basic cylinder without mounting accessories, order the SC40X25. The mounting holes match the F-SC40LB bracket pattern, so you can also remove the feet and use the cylinder body's integral tie-rod nuts for alternative mounting.
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