The AirTAC Airtac SC40 Standard Cylinder SC40X20H is a genuine double-acting standard air cylinder with a Ø40mm bore and 20mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X20H is a short-stroke, high-temperature double-acting cylinder delivering 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa). With a 20 mm stroke and a 16 mm diameter piston rod, it is built for compact thermal applications where standard TPU seals would degrade.
Equipped with Viton (FKM) seals, this model operates reliably from 0 to +150 °C, making it suitable for autoclaves, drying ovens, or foundry equipment. The SC series features a tie-rod construction with an adjustable air cushion (21 mm) to decelerate the piston quietly at end-of-stroke.
| Model | Airtac SC40 Standard Cylinder SC40X20H |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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. |
| ×20 | 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.
Viton seals enable direct mounting inside autoclaves, curing ovens, and sterilisation chambers where ambient temperatures reach 150 °C.
The 20 mm stroke and 628 N force at 0.5 MPa are ideal for high-temperature clamping and pressing fixtures in composite bonding processes.
Resists radiant heat and aggressive environments in foundry core-making machines and glass forming lines, providing consistent double-acting motion.
For higher force in the same compact form factor, step up to the 50 mm bore SC50 series, which provides 982 N at 0.5 MPa. If a lower force with a smaller footprint is acceptable, the 32 mm bore SC32 series offers 402 N. This 20 mm stroke is a standard length for the 40 mm bore.
When replacing an existing cylinder, match five key points: 40 mm bore, 20 mm stroke, PT1/4 port thread, basic mounting (no factory bracket), and the Viton seal designation. The SC40 is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profile cylinders.
Quick checklist
At 0.7 MPa operating pressure, the theoretical push force is 879 N, and the pull force is 528 N. The maximum operating force at 0.9 MPa is 1130 N.
No. The AirTAC SC series is a tie-rod cylinder with a shorter body length (body length A is 142 mm) than an equivalent ISO 15552 cylinder. It is not dimensionally interchangeable. Replace only with another AirTAC SC40 tie-rod cylinder matching the stroke, port, and seal type.
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