The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X40-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø80mm bore, 40mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X40-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering a substantial 2513 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides a 40 mm range to fine-tune the stroke end position, making it ideal for applications requiring precise end-stop calibration without swapping the cylinder. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable position feedback.
With an 80 mm bore, 25 mm diameter piston rod, and PT3/8 ports, this tie-rod cylinder is built for robust industrial use. The adjustable air cushion decelerates the piston smoothly over the final 28 mm of travel, protecting the end cap. This model's body length A(SCJ) is 239 mm, and it operates within a standard pressure range of 0.15-1.0 MPa.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X40-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 40 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×40 | Nominal (maximum) stroke length in mm. |
| -40 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Technicians can fine-tune the actuator's end stop on a new assembly line in seconds using the rear screw, eliminating the need to machine custom stops or swap out cylinders during initial machine setup.
In high-cycle clamping or pressing fixtures, the 40 mm adjustment range allows operators to easily take up mechanical wear on tooling or contact surfaces, maintaining consistent clamping force and part quality over time.
On a packaging line, the stroke can be quickly adjusted to accommodate a new box size or product variant. The built-in magnet provides sensor confirmation of the new stroke end, ensuring the changeover is verified by the control system.
Choose the SCJ80X40-40S when you need to precisely dial in a short stroke end position during commissioning or changeovers. If 2513 N of push force is insufficient, stepping up to the 100 mm bore provides 3927 N. Conversely, if a smaller footprint is needed, the 63 mm bore offers 1559 N. This adjustable-stroke model is the right pick over a fixed-stroke SC when the exact stroke length is unknown or needs periodic adjustment.
For a direct replacement, match the 80 mm bore, 40 mm nominal stroke, 40 mm adjust range, PT port thread, and the built-in magnet. This basic mount version requires a separate mounting bracket from the SCJ subset, such as an FA front flange or LB foot mount. If the application involves significant side loading, consider an external guide rail to prevent rod bending.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it generates 2513 N of push force and 2268 N of pull force. The pull force is lower because the piston rod area reduces the effective surface area on the return stroke. The maximum push force at 0.9 MPa is 4523 N.
Yes, if you need the 40 mm stroke adjustability. The SCJ80X40-40S shares the same 80 mm bore, rod diameter, and port size as a standard SC80. Ensure your mounting and sensor setup is compatible, and note the SCJ body is slightly longer to house the adjusting mechanism.
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