The AirTAC SC40 Standard Cylinder SC40X78 is a genuine double-acting standard air cylinder with a Ø40mm bore and 78mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X78 is a 40 mm bore double-acting tie-rod cylinder with a non-standard 78 mm stroke, built for applications needing a compact push length that falls between the common 75 mm and 80 mm standard steps. At 0.5 MPa it delivers 628 N of push force, making it suitable for light clamping, sorting, and assembly tool actuation.
Its 16 mm diameter chrome-plated rod and M12x1.25 knuckle thread provide good column strength for this stroke, while the 21 mm adjustable air cushion at each end decelerates the piston smoothly. The body length A is 142 mm, giving an extended length of approximately 220 mm.
| Model | Airtac SC40 Standard Cylinder SC40X78 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 78 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. |
| ×78 | 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 78 mm stroke provides a precise stopping or locating action for small parts on a conveyor line, where a standard 75 mm stroke is slightly too short.
Delivers 628 N of clamping force at 0.5 MPa, ideal for holding workpieces in light machining or welding jigs where space is limited.
Operates small quarter-turn valves or diverters with a compact 78 mm travel, fitting into tight actuator mounting envelopes.
Choose the SC40X78 when a 78 mm stroke is the exact fit for your mechanism, avoiding the need to add external spacers. If your load requires more force, the SC50 series steps up to 982 N push at 0.5 MPa with a 20 mm rod. For strokes over 100 mm on a 40 mm bore, consider an external guide if the rod is subjected to side load, as the tie-rod construction is designed for axial thrust. When replacing, match bore, stroke, PT port thread, and the basic mount configuration.
Quick checklist
At 0.7 MPa operating pressure, the SC40X78 produces 879 N of push force. The pull force on the retract stroke is 528 N at 0.5 MPa due to the 16 mm rod area.
No, 78 mm is a non-standard stroke for the 40 mm bore SC cylinder. Standard strokes for this bore are 25, 50, 75, 80, 100, 125, 150, 160, 175, and 200 mm up to a maximum of 1200 mm.
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