The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X225-40S 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, 225mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X225-40S is an 80 mm bore double-acting single-rod cylinder with a rear-cap adjusting screw that gives you up to 40 mm of field-adjustable stroke-end range, so you can fine-tune the stop position without swapping the cylinder or adding external hard stops. At 0.5 MPa it delivers 2513 N push and 2268 N pull, and at the maximum operating pressure of 0.9 MPa the push force reaches 4523 N, making it a strong mid-bore actuator for positioning and pressing tasks.
This model includes a built-in magnet (-S suffix), so CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for non-contact end-of-stroke sensing. The 25 mm piston rod and PT3/8 ports provide generous flow for speeds up to 800 mm/s, while the 28 mm air cushion at each end decelerates the piston quietly. Body length A(SCJ) is 239 mm, slightly longer than the fixed-stroke SC version to house the adjusting mechanism.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X225-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 225 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. |
| ×225 | 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.
Dial in the exact stroke end during machine commissioning without machining spacers. The 40 mm screw adjustment lets technicians quickly compensate for stack-up tolerances in welded frames or fabricated brackets.
On packaging or assembly lines that run multiple product sizes, operators can adjust the cylinder stroke end in seconds to match a new box height or part length, reducing changeover downtime.
Fine-tune the pressing depth or clamp closure point on a pneumatic press fixture. The 4523 N max push force combined with the 40 mm adjustable range gives precise control for delicate assembly or forming operations.
Step up to the 100 mm bore SCJ if you need more force — the SCJ100 delivers 3927 N push at 0.5 MPa. For a simpler fixed-stroke actuator where the end position never changes, the standard SC80 is a lighter, shorter alternative. If you are replacing an existing SCJ80X225-40S, match the bore, nominal stroke, 40 mm adjust range, PT thread, basic mounting, and the -S magnet option to keep sensor compatibility.
At 225 mm nominal stroke the rod is still well-supported inside the barrel, but if your application applies a side load or the rod extends into an unguided tool, consider an external linear guide or a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
Push force at 0.5 MPa is 2513 N, and pull force is 2268 N (the difference is due to the 25 mm single rod). At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The 40 mm adjusting screw only changes the stroke end position — it does not alter the cylinder's force output.
Yes, provided you need the 40 mm adjustable stroke-end feature. The SCJ80X225-40S has the same 80 mm bore, PT3/8 ports, and single-rod design as an SC80, but the body is slightly longer (239 mm A-length) to house the rear adjusting screw. Ensure your mounting arrangement has clearance for the extra length and that you match the -S magnet option if your machine uses sensors.
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