The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X150-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø250mm bore, 150mm nominal stroke, PT1" ports and adjustable end cushioning.
The AirTAC SCJ250X150-10 is a double-acting, single-rod pneumatic cylinder engineered for heavy-duty linear applications where the stroke end position must be fine-tuned on the machine. Its rear-cap adjusting screw provides a 10 mm range to shorten the stroke, allowing maintenance teams to compensate for wear or changeover tooling without replacing the entire actuator. With a 250 mm bore and 50 mm piston rod, this ISO 6430 class tie-rod cylinder delivers a substantial 24544 N of push force at 0.5 MPa.
At the maximum operating pressure of 0.9 MPa, the push force reaches 44178 N, making it suitable for pressing, clamping, and lifting large assemblies. The unit features a 40 mm air cushion to decelerate the high-inertia piston near the stroke end, protecting the end cap. Its body length A is 409 mm, and it uses a PT1 inch port for connection. The standard TPU seal operates reliably between -20 and +70 °C.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X150-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 10 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -10 | 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.
The 10 mm adjustable stroke allows operators to precisely dial in the final press depth for bearing or bushing insertion stations, ensuring consistent assembly quality without swapping hard stops.
In large welding fixtures, the SCJ250X150-10 can be fine-tuned to synchronize the clamping force application, compensating for variations in workpiece thickness across production batches.
For high-cycle material diverters handling heavy pallets, the rear adjusting screw lets maintenance staff quickly take up mechanical wear in the linkage, extending the service interval of the automation cell.
Select the SCJ250X150-10 when you need a 150 mm nominal stroke with the ability to dial back the end position by up to 10 mm during commissioning. If your force requirement is lower, stepping down to the 200 mm bore SCJ series reduces the push force to 15708 N at 0.5 MPa, saving physical space and air consumption. For applications that do not require stroke adjustability, the fixed-stroke SC250X150 is a direct alternative with identical mounting footprints.
This model is a direct replacement for another AirTAC SCJ250X150-10 with PT ports and basic mounting. For strokes of 300 mm or longer in this bore size, always evaluate the side-load on the 50 mm rod; an external guide rail or a guided cylinder assembly is recommended to prevent rod bending and premature bearing wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 44178 N. Because this is a single-rod cylinder, the pull force is always lower due to the area of the 50 mm rod.
No. The rear adjusting screw only sets the mechanical stroke end position; it is not a locking device. If the directional valve is centered or air pressure is exhausted, the piston can drift or drop. A pilot-operated check valve or an external mechanical brake is required to hold the load safely without live air pressure.
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