The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X200-40S 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, 200mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X200-40S is an 80 mm bore double-acting single-rod cylinder that lets you fine-tune the stroke end position by up to 40 mm using the rear adjusting screw, without removing the cylinder from the machine. Its 25 mm diameter rod and PT3/8 ports deliver a push force of 2513 N at 0.5 MPa and 4523 N at 0.9 MPa, making it a strong choice for medium-duty automation tasks where the stroke needs to be dialled in precisely during commissioning or changeover.
This model includes a built-in magnet (-S suffix), so you can clamp CMSG, DMSG or EMSG reed or solid-state sensors directly onto the tie-rod barrel for non-contact position sensing. The body length A(SCJ) is 239 mm, and the standard TPU seal works reliably from -20 to +70 °C with filtered air. The adjustable cushion decelerates the piston smoothly at both ends, and the stroke is set within a 40 mm window from the nominal 200 mm maximum.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X200-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 200 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. |
| ×200 | 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.
During machine commissioning, the 40 mm rear adjuster lets technicians fine-tune the end-stop position without swapping cylinders or machining external hard stops, speeding up the final alignment of clamps, pushers, or diverters.
On packaging or assembly lines that handle multiple product sizes, the adjustable stroke allows a single actuator to be quickly reset for different box heights or part widths, reducing changeover time and the need for a stock of different stroke cylinders.
In pressing or crimping operations, the stroke-end screw can be advanced over time to compensate for tooling wear, maintaining consistent press depth and part quality without replacing the actuator or adding shims.
Step up to the SCJ100 series if you need more force—the 100 mm bore provides 3927 N of push at 0.5 MPa. If your application does not require field-adjustable stroke, the fixed-stroke SC80X200 is a simpler, slightly shorter alternative. For a direct replacement, match the 80 mm bore, 200 mm nominal stroke, 40 mm adjust range, PT port thread, basic mounting, and the built-in magnet; the replacement part code is SCJ80X200-40S.
At a 200 mm stroke, the 25 mm rod is robust, but if the load applies a significant side force or the cylinder is mounted horizontally with a heavy end-effector, consider adding an external linear guide or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 513 kgf (5026 N). Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area on the return side.
The rear-cap adjusting screw sets the stroke end position within a 40 mm range, shortening the 200 mm nominal stroke as needed. It is a direct mechanical stop, not a speed or force control. The SCJ80X200-40S can replace a fixed-stroke SC80 cylinder of the same bore and port thread if you need the ability to fine-tune the stroke, but the SCJ body is slightly longer to accommodate the adjusting mechanism.
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