The AirTAC Airtac SC40 Standard Cylinder SC40X690S is a genuine double-acting standard air cylinder with a Ø40mm bore and 690mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC40X690S is a double-acting tie-rod cylinder with a 40 mm bore and a 690 mm stroke, factory-equipped with a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors. At 0.5 MPa it provides 628 N of push force and 528 N of pull force, making it a capable mid-range actuator for automated positioning tasks.
This model uses a 16 mm diameter piston rod with an M12x1.25 thread and PT1/4 ports. The adjustable air cushion at each end (21 mm cushion length) decelerates the piston smoothly, protecting end caps during high-cycle operation. The total extended body length is approximately 832 mm (142 mm body length A + 690 mm stroke).
| Model | Airtac SC40 Standard Cylinder SC40X690S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 690 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. |
| ×690 | 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 built-in magnet enables end-of-stroke detection via barrel-mounted sensors, ideal for pick-and-place units where the controller must confirm cylinder position before the next sequence step.
Use the SC40X690S in a welding or assembly fixture where the 628 N clamping force is sufficient and the magnet allows the PLC to verify the clamp is fully closed or open.
The 690 mm stroke suits a material-handling gate or lane diverter on a conveyor. Pair with an external guide rail to support the rod against side loads from product impact.
Select the SC40X690S when your application needs sensor feedback from a 40 mm bore cylinder. The built-in magnet lets you clamp CMSG/DMSG/EMSG reed or solid-state sensors directly onto the barrel without extra brackets. If you require higher force, step up to the SC50 series which delivers 982 N push at 0.5 MPa; for a lighter, more compact solution, the SC32 provides 402 N.
At 690 mm stroke, the unsupported rod length is significant. Any side load will create a bending moment on the 16 mm rod and the rod bearing. Use an external linear guide or a guided cylinder assembly to absorb transverse forces and prevent premature seal wear or rod buckling. For replacement, match bore (40 mm), stroke (690 mm), port thread (PT), magnet option (-S), and mounting style exactly.
Quick checklist
At 0.5 MPa the cylinder produces 628 N extending and 528 N retracting. 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 indicates a built-in magnet inside the piston. You can clamp AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors directly onto the barrel to detect piston position without any additional mounting hardware.
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