The AirTAC Airtac SC40 Standard Cylinder SC40X1250STC is a genuine double-acting standard air cylinder with a Ø40mm bore and 1250mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X1250STC is a double-acting tie-rod cylinder with a 40 mm bore and an extended 1250 mm stroke, pushing 628 N at 0.5 MPa and up to 1130 N at 0.9 MPa. Its 16 mm diameter piston rod and 21 mm adjustable air cushion are sized for moderate-duty linear tasks, while the built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for end-of-stroke detection.
This non-standard stroke model exceeds the standard 1200 mm maximum for the 40 mm bore, making it a made-to-order unit for applications needing extra reach. The centre-trunnion TC mount (supplied with TCM1 bracket, part F-SC40TC) lets the cylinder pivot during operation, absorbing misalignment in swinging or articulating mechanisms.
| Model | Airtac SC40 Standard Cylinder SC40X1250STC |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 1250 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. |
| ×1250 | 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 1250 mm stroke and pivoting trunnion mount suit long-throw diverter gates on wide conveyors, where the cylinder must swing to follow the gate arc.
Operates large roof or side vents in agricultural buildings. The centre trunnion allows the cylinder body to pivot as the vent linkage moves through its arc.
Positions unwind or rewind rollers in web handling. The magnet sensors provide precise end-of-travel feedback to the control system for roll changeover.
For a 40 mm bore, the SC40 delivers 628 N of push force at 0.5 MPa. If your load requires more thrust, stepping up to the 50 mm bore (SC50) provides 982 N at the same pressure. At 1250 mm stroke, the rod is fully extended far from the front bearing; any side load or off-axis force can cause rod deflection or accelerated seal wear. For such long strokes, use an external linear guide or a guided cylinder to protect the rod and bearing.
To replace an existing cylinder, match five points: 40 mm bore, 1250 mm stroke, PT1/4 port thread, centre-trunnion mounting with TCM1 bracket, and the magnet-equipped -S variant for sensor compatibility.
Quick checklist
At the standard operating pressure of 0.7 MPa, the cylinder produces 879 N of push force. At the maximum operating pressure of 0.9 MPa, it generates 1130 N. The theoretical pull force at 0.5 MPa is 528 N.
No, the 1250 mm stroke exceeds the standard maximum of 1200 mm for the 40 mm bore. This is a non-standard, made-to-order length. Contact your distributor for lead time.
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