The AirTAC SC40 Standard Cylinder SC40X25H is a genuine double-acting standard air cylinder with a Ø40mm bore and 25mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC40X25H is a compact-stroke double-acting pneumatic cylinder built for high-temperature environments, with a 40 mm bore and 25 mm stroke. Its Viton (FKM) seals shift the operating range to 0–150 °C, making it suitable for autoclaves, drying equipment, and hot-work holding fixtures.
At 0.5 MPa it pushes with 628 N and pulls with 528 N, rising to 1130 N push at 0.9 MPa. The 16 mm diameter piston rod and 21 mm adjustable air cushion provide smooth end-of-stroke deceleration. Body length A is 142 mm, giving a total extended length of approximately 167 mm.
| Model | Airtac SC40 Standard Cylinder SC40X25H |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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. |
| ×25 | 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 withstand 150 °C ambient, allowing the 40 mm bore cylinder to clamp tooling in heated platen presses and composite curing molds.
The 25 mm stroke operates door locks and small valve actuators inside steam sterilizers where saturated vapor and high heat degrade standard seals.
Delivers a short, precise 25 mm stroke to nozzles and dispensing heads on hot-melt adhesive lines, resisting seal swell from aggressive fumes.
Select the SC40X25H when the application runs above 70 °C and needs a short, stiff stroke. If room-temperature force is the priority, stepping up to the SC50 (982 N push at 0.5 MPa) may reduce the required operating pressure. For strokes beyond the 1200 mm standard maximum of this bore, a non-standard order is required.
To replace an existing unit, match five points: 40 mm bore, 25 mm stroke, PT port thread (1/4"), basic mounting, and the -S magnet option if sensors are used. This model carries the H suffix for Viton seals; ensure the replacement also specifies H if the process temperature exceeds 70 °C.
Quick checklist
At 0.7 MPa supply pressure the cylinder produces 879 N extending (push) and approximately 739 N retracting (pull), based on the 40 mm bore and 16 mm rod diameter.
Only if the process temperature stays below 70 °C. The standard TPU seals are rated for -20 to +70 °C. The H suffix specifies Viton seals for 0–150 °C; substituting a non-Viton cylinder in a hot environment will cause premature seal failure.
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