The AirTAC Airtac SC40 Standard Cylinder SC40X250SN is a genuine double-acting standard air cylinder with a Ø40mm bore and 250mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X250SN is a double-acting pneumatic cylinder delivering a push force of 628 N at 0.5 MPa and up to 1130 N at 0.9 MPa. With a 40 mm bore and 250 mm stroke, it features a 16 mm diameter piston rod and a 21 mm adjustable air cushion for smooth end-of-stroke deceleration.
This model is equipped with a built-in magnet (suffix -S), allowing easy mounting of CMSG/DMSG/EMSG reed or solid-state sensors directly onto the tie-rod barrel for precise position feedback. The NBR seal material (suffix -N) provides reliable sealing for standard industrial environments, and the PT1/4 port thread ensures straightforward pneumatic connection.
| Model | Airtac SC40 Standard Cylinder SC40X250SN |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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. |
| ×250 | 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 40 mm bore provides ample force to actuate diverter gates on packaging or assembly conveyors, while the built-in magnet enables precise end-of-travel sensing for high-speed sortation logic.
Ideal for medium-duty workpiece clamping in CNC machining or welding fixtures. The NBR seals are compatible with common shop air, and the sensor-ready design confirms clamp engagement before a cycle starts.
Provides reliable push-pull motion for seed drill depth adjustment or sprayer boom folding. The tie-rod construction is durable and field-serviceable, and the NBR seals handle typical agricultural air supply conditions.
Choose the SC40 when your application requires a force between the SC32 (402 N push at 0.5 MPa) and the SC50 (982 N push at 0.5 MPa). The 250 mm stroke is a standard length for this bore, keeping the total extended length to approximately 392 mm. For a correct replacement, match five key points: bore (40 mm), stroke (250 mm), port thread (PT1/4), the built-in magnet (-S), and the NBR seal material.
For this 250 mm stroke, the 16 mm rod is well-supported within standard limits. However, always avoid direct side loading on the rod; if lateral forces are present in your mechanism, use an external linear guide to protect the rod bearing and ensure long service life.
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 force at 1.0 MPa is 128 kgf.
The -S suffix indicates a magnet is integrated into the piston, making it compatible with AirTAC's CMSG (reed) and DMSG/EMSG (solid-state) series sensors, which clamp directly onto the cylinder's tie-rods. Standard proximity sensors will not work; you must use the specified magnetic field-sensing switches designed for tie-rod mounting.
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