The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X50-10S 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, 50mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X50-10 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, delivering 24544 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 10 mm of stroke-end reduction, letting you fine-tune the piston stop position without swapping the cylinder or adding external hard stops. The 50 mm rod and 40 mm cushion length suit heavy, controlled end-of-stroke deceleration.
This ISO 6430 class tie-rod cylinder includes a built-in magnet, so CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the barrel for reliable end-of-stroke sensing. The PT1 inch ports and M42x2 rod thread handle high flow, and the TPU seals work from -20 to +70 °C. Body length A(SCJ) is 409 mm, providing a robust platform for demanding industrial tasks.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X50-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 50 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. |
| ×50 | 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 adjusting screw allows operators to precisely set the final pressing depth on a hydraulic-style pneumatic press, compensating for tooling wear or material thickness variations without reprogramming.
During commissioning of large butterfly or gate valves, the adjustable stroke lets technicians fine-tune the actuator's end position to ensure a perfect seal without over-torquing the valve stem.
In heavy material handling, the cylinder's stroke end can be adjusted to set a precise roller gap for different steel slab thicknesses, with the built-in magnet providing position confirmation via sensors.
Choose the SCJ250X50-10 when you need massive push force and the ability to dial in the stroke end on the machine. If 24544 N at 0.5 MPa is more force than required, stepping down to the 200 mm bore SCJ200 series gives 15708 N push at the same pressure. For applications needing a fixed, non-adjustable stroke, the standard SC250 cylinder is the direct alternative. This model is a direct replacement for another AirTAC SCJ250 adjustable-stroke cylinder with a 50 mm nominal stroke, 10 mm adjust range, PT ports, and a built-in magnet.
Adjustable-stroke checklist
At 0.5 MPa, push force is 24544 N and pull force is 23562 N. The maximum push force at the 0.9 MPa operating limit is 44178 N. The theoretical force at 1.0 MPa is 5006 kgf. Push force is always higher than pull force because it is a single-rod cylinder.
Yes, if you need the adjustable stroke feature. The SCJ250X50-10 matches the SC250's bore and nominal 50 mm stroke, but adds a rear adjusting screw with a 10 mm range. Ensure the slightly longer body length A(SCJ) of 409 mm fits your machine, and match the port thread (PT), magnet option (S), and mounting.
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