The AirTAC Airtac SC40 Standard Cylinder SC40X8S is a genuine double-acting standard air cylinder with a Ø40mm bore and 8mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X8S is a compact-stroke double-acting cylinder delivering 628 N of push force at 0.5 MPa, rising to 1130 N at 0.9 MPa. Its 40 mm bore and 16 mm piston rod suit short linear positioning tasks where space is tight but force demand is moderate.
This model carries the -S suffix for a built-in magnet, allowing CMSG or DMSG sensors to be clamped directly onto the tie-rod barrel for contactless end-of-stroke detection. The body length A is 142 mm, and with an 8 mm stroke the extended length stays very short—ideal for clamping fixtures or ejector stations where overall length must be minimised.
| Model | Airtac SC40 Standard Cylinder SC40X8S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 8 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. |
| ×8 | 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 SC40X8S delivers 628 N at 0.5 MPa in an ultra-short 8 mm stroke, perfect for pneumatic clamping fixtures on CNC workholding or assembly jigs where sensor confirmation of clamp position is required.
Use the 8 mm stroke to push small parts off a conveyor or into a reject chute. The built-in magnet lets a CMSG sensor verify each eject cycle, preventing missed rejects.
Ideal for light-duty pressing such as label application or ink stamping. The short stroke limits dwell time, and the sensor confirms the press stroke completed before the next cycle.
For a step up in force, the SC50 bore provides 982 N at 0.5 MPa; for a lighter, more compact option the SC32 delivers 402 N. At only 8 mm stroke, side-load concerns are minimal, but always align the rod axis with the load to prevent premature rod bearing wear. When replacing an existing cylinder, match five points: 40 mm bore, 8 mm stroke, PT1/4 port thread, the built-in magnet (-S), and the basic (no-bracket) mounting configuration.
Quick checklist
At 0.5 MPa the cylinder produces 628 N pushing and 528 N pulling. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
Yes. The -S suffix equips the SC40X8S with a magnet on the piston, making it compatible with AirTAC CMSG (reed) and DMSG/EMSG (solid-state) sensors that mount directly onto the cylinder barrel via the tie-rod slots.
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