The AirTAC Airtac SC Standard Cylinders SC40X125G is a genuine double-acting standard air cylinder with a Ø40mm bore and 125mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X125G is a 40 mm bore double-acting tie-rod cylinder with G1/4 BSPP ports, sized for a 125 mm stroke. At 0.5 MPa it pushes with about 628 N (64 kgf), which covers the mid-light duty band where a 32 mm bore would be marginal. The 16 mm hardened rod, M12x1.25 male knuckle thread and 21 mm adjustable cushion give it the durability expected on continuous-cycle OEM machinery. This G-thread version seals on a parallel port face with a bonded washer or O-ring, so it is the right pick when your manifold or valve plate is drilled for BSPP rather than the standard tapered PT/Rc ports. The compact 142 mm body length A keeps the installed envelope short, and the piston reaches 1130 N of push force at the 0.9 MPa upper operating limit.
| Model | Airtac SC Standard Cylinders SC40X125G |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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. |
| ×125 | 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.
A 628 N push at 0.5 MPa rejects or diverts filled cartons at a transfer point across a 125 mm lateral stroke, with the 21 mm adjustable cushion absorbing the end-of-shift impact of thousands of cycles.
The 1130 N push available at 0.9 MPa holds aluminum brackets against hard stops on a CNC fixture plate, and the G1/4 BSPP ports plum straight into a BSPP-drilled manifold avoid adapter fittings.
The 16 mm rod raises the hinged lid of a bakery tray stacker through its 125 mm arc, where the 528 N pull stroke at 0.5 MPa comfortably overcomes lid weight and hinge friction.
Size in both directions before committing: the bore below, SC32, delivers only 402 N at 0.5 MPa, while the bore above, SC50, gives 982 N. If your duty cycle runs hot or the load sits near 600 N for long shifts, the SC40X125G is the comfortable middle choice. Thread-wise, confirm your existing fittings and manifold: BSPP (G) ports take straight-threaded fittings that seal on a bonded face washer, common on EU and Asian OEM lines, whereas NPT and PT tapered threads seal on the thread crest itself. Mixing standards forces adapters that add leak points. For a like-for-like replacement match all five parameters: bore (40), stroke (125), port thread (G1/4 BSPP), mounting accessory (LB, FA, FB, CA, CB, TC or TCM1), and whether a magnet is fitted (add -S for CMSG/DMSG/EMSG sensor use). At 125 mm stroke the rod is well supported inside the 21 mm cushioned head, so a separate guide is only needed if side load is inherent to the mechanism.
Quick checklist
At 0.5 MPa it pushes with 628 N and pulls with 528 N (the difference is the 16 mm rod area). At the 0.9 MPa upper operating limit, push force rises to 1130 N. The theoretical maximum at 1.0 MPa is about 128 kgf. Speed range is 30-800 mm/s with clean, 40 micron filtered air.
Yes, if all five parameters match the original AirTAC SC or equivalent tie-rod unit: 40 mm bore, 125 mm stroke, G1/4 BSPP port thread, the same mounting accessory code (F-SC40LB, F-SC40FA, etc.), and the same magnet option. The G suffix matters here - it is a parallel BSPP thread sealing on a bonded washer, not the standard tapered PT port, so verify before ordering. Note the SC is not an ISO 15552 profile cylinder and is shorter than one, so do not treat it as dimensionally interchangeable with ISO 15552 units.
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