The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X200-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø250mm bore, 200mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X200-30S is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ series, featuring a rear-cap adjusting screw that provides a 30 mm field-adjustable stroke range. With a 250 mm bore and a nominal 200 mm stroke, this tie-rod cylinder delivers a substantial 24544 N of push force at 0.5 MPa, making it suitable for heavy-duty industrial positioning tasks where the end-of-stroke position requires fine-tuning during commissioning or format changes.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors onto the barrel for precise, non-contact position feedback. The 50 mm diameter piston rod and PT 1 inch ports handle high flow rates, while the 40 mm air cushion decelerates the piston smoothly at the stroke end. The body length A(SCJ) is 409 mm, and the operating temperature range is -20 to +70 °C with the standard TPU seals.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X200-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1" |
| Rod thread | M42×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 | 24544 N | 23562 N |
| 0.7 MPa | 34361 N | — |
| Max (@1.0 MPa) | 5006 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. |
|---|---|
| 250 | Bore size in mm. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
Fine-tune the final pressing depth in large forming or laminating presses. The 30 mm adjust range allows operators to compensate for tooling wear or material thickness variations without disassembling the machine.
Adjust the opening position of a diverter gate on a heavy-duty conveyor line. The adjustable stroke allows for quick recalibration when handling different product sizes, and the built-in magnet provides gate position confirmation.
Set the final clamp position for large weldments or castings in a fixture. The screw adjustment provides a repeatable, fine-tuned clamping point, while the 24544 N force at 0.5 MPa ensures the part is held securely during machining.
Choose the SCJ250X200-30S when your application requires a high-force, adjustable end-stop position without the need for external hard stops. If the 24544 N push force at 0.5 MPa is more than you need, stepping down to a 200 mm bore (SCJ200) reduces the push force to 15708 N, which may be a better fit for lighter structural frames. For applications requiring a fixed, non-adjustable stroke, the standard SC series is a direct alternative. A true replacement must match the 250 mm bore, 200 mm nominal stroke, 30 mm adjust range, PT port thread, and the built-in magnet for sensor compatibility.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 24544 N, and the pull force is 23562 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 44178 N. The pull force is lower due to the area of the 50 mm piston rod.
The SCJ has a rear-cap adjusting screw that lets you shorten the stroke end by up to 30 mm. This is for fine-tuning the piston's stopping position in the field. A standard SC cylinder has a fixed stroke that cannot be adjusted without changing the cylinder or adding external stops.
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