The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X200-30 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 SCJ250X200-30 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, built on a robust tie-rod design. Its rear-cap adjusting screw provides up to 30 mm of stroke-end reduction, allowing commissioning engineers to fine-tune the stopping position without changing the cylinder or adding external hard stops. At 0.5 MPa, it delivers a substantial 24544 N of push force and 23562 N on the pull stroke, driven by a 50 mm diameter piston rod.
This ISO 6430 class cylinder uses a 1-inch PT port and an M42x2 rod thread, with a generous 40 mm air cushion to decelerate high-inertia loads. The body length A(SCJ) is 409 mm, accommodating the rear adjustment mechanism. Operating on filtered air from 0.15 to 1.0 MPa, it handles temperatures from -20 to +70 °C, making it a powerful solution for heavy-duty industrial positioning tasks.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X200-30 |
|---|---|
| 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 on a large hydraulic-pneumatic forming press during commissioning, using the 30 mm adjustment range to achieve precise part dimensions without mechanical shims.
Dial in the exact push-off position for heavy pallets on a layer-forming station, compensating for pallet base wear or different product heights with a simple screw adjustment on the cylinder.
Set the precise open position of a large material flow gate in a foundry or recycling plant, using the adjustable stroke to control the discharge gap for different material grades without replacing the actuator.
Select the SCJ250X200-30 when you need a high-force actuator with the flexibility to dial in the exact stroke end position during setup or changeover. If your application requires even more force, the next bore up is not available in this series, so consider a larger custom solution. For a step down in force, the SCJ200 bore offers 15708 N of push force at the same pressure. If your motion profile is purely fixed and never needs adjustment, the standard SC250X200 fixed-stroke cylinder is a simpler, more cost-effective alternative.
For this 200 mm stroke, ensure the load is guided externally to prevent side-loading and bending of the 50 mm rod. The replacement match for this model is another SCJ adjustable-stroke cylinder with a 250 mm bore, a 200 mm nominal stroke, a 30 mm adjustment range, and PT port threads. This model is configured with a basic mount, TPU seals, and no magnet.
Adjustable-stroke checklist
The cylinder's output force is determined by the 250 mm bore and air pressure, not the stroke adjustment. At 0.5 MPa, it provides 24544 N of push force and 23562 N of pull force. The rear adjusting screw only changes the physical stroke end position by up to 30 mm; it does not alter the cylinder's force capacity.
It can physically replace another AirTAC SCJ250 cylinder with the same 200 mm nominal stroke, 30 mm adjustment range, and PT port threads. It is not a direct dimensional drop-in for a fixed-stroke SC cylinder or an ISO 15552 profile cylinder, as the SCJ body is longer to house the adjusting screw. Always verify the A(SCJ) body length of 409 mm against your available space.
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