The AirTAC Airtac SC40 Standard Cylinder SC40X390 is a genuine double-acting standard air cylinder with a Ø40mm bore and 390mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X390 is a double-acting single-rod pneumatic cylinder delivering 628 N of push force and 528 N pull force at 0.5 MPa, scaling up to 1130 N at 0.9 MPa. With a 40 mm bore and a 390 mm stroke, this model is well-suited for medium-duty linear tasks where a compact tie-rod design is preferred.
Its 16 mm diameter piston rod and 21 mm air cushion at each end provide reliable deceleration, while the PT1/4 port ensures straightforward pneumatic connection. The total extended body length is approximately 532 mm, making it a practical choice for machinery requiring a stroke just under 400 mm.
| Model | Airtac SC40 Standard Cylinder SC40X390 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 390 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. |
| ×390 | 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.
Actuates diverter or stop gates on conveyor lines, using the 390 mm stroke to control the flow of small to medium-sized packages with 628 N of push force.
Provides consistent clamping pressure for woodworking or light metal fabrication jigs, where the 16 mm rod offers good rigidity over the extended length.
Operates chutes or sorting mechanisms in agricultural equipment, leveraging the tie-rod construction for easy maintenance and reliable performance in dusty conditions.
For applications needing more force, stepping up to the SC50 bore provides 982 N of push at 0.5 MPa, while stepping down to the SC32 bore offers 402 N for lighter, faster cycles. At a 390 mm stroke, ensure the load is guided externally if significant side forces are present, as the unsupported rod can experience bending moments.
When replacing an existing cylinder, match five key points: the 40 mm bore, 390 mm stroke, PT1/4 port thread, basic (no bracket) mounting, and the absence of a built-in magnet. This SC40X390 uses standard TPU seals for a -20 to +70 °C operating range.
Quick checklist
At the standard operating pressure of 0.5 MPa, this cylinder produces 628 Newtons pushing out and 528 Newtons pulling in. At the maximum operating pressure of 0.9 MPa, the push force increases to 1130 N.
It is recommended to use an external guide or rod support for strokes of 300 mm or more, especially if the load applies any side force. Without guidance, the 16 mm rod is susceptible to bending, which can damage the rod bearing and seals.
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