The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X175-10 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, 175mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X175-10 is a double-acting, single-rod pneumatic cylinder engineered for heavy-duty applications where the stroke end position must be fine-tuned on the machine. A rear-cap adjusting screw provides a 10 mm field-adjustable range, letting technicians dial in the exact stop point during commissioning or format changes without swapping the cylinder. With a 250 mm bore and 50 mm diameter piston rod, this ISO 6430 class tie-rod actuator generates a substantial 24544 N of push force at 0.5 MPa.
At 0.9 MPa maximum operating pressure, the push force reaches 44178 N, making it suitable for pressing, clamping, and lifting large assemblies. The cylinder features a 40 mm adjustable air cushion to decelerate the piston smoothly, and the body length A(SCJ) is 409 mm. It uses a PT1 inch port and an M42x2 rod thread for robust mechanical connections. This basic configuration comes with a TPU seal, PT threads, and no magnet, ready for standard industrial air supply.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X175-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 175 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. |
| ×175 | 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.
Fine-tune the final press depth in bearing or bushing insertion stations. The 10 mm screw adjustment compensates for part tolerance stack-up without reprogramming the press.
In large welding fixtures, the adjustable stroke end takes up wear on clamp pads over thousands of cycles, maintaining consistent clamping force on the workpiece.
Set the precise end position for a heavy transfer arm or pusher. Operators can quickly recalibrate the stop point after a product changeover on a conveyor line.
Choose the SCJ250 when your application demands the highest force in the SCJ range, with 24544 N of push at 0.5 MPa. If your force requirement is lower, stepping down to the 200 mm bore provides 15708 N of push, which may reduce energy consumption and physical footprint. The 10 mm adjustable stroke end is ideal for taking up small mechanical tolerances or wear in tooling. For applications needing a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This cylinder replaces any AirTAC SCJ250X175-10 with PT ports and basic mounting. For strokes of 175 mm, ensure the rod is guided externally if significant side loads are present to prevent bending and seal wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, 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 increases to 44178 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
Yes, the SCJ250X175-10 can replace a fixed-stroke SC cylinder of the same 250 mm bore and 175 mm nominal stroke, provided the 10 mm stroke reduction is acceptable or can be dialed out. You must match the port thread (PT), mounting style (basic), and magnet option (none) for a direct physical and functional replacement.
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