The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X160-30 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, 160mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X160-30 is a double-acting, single-rod pneumatic cylinder with an integrated rear-cap adjusting screw, providing up to 30 mm of field-adjustable stroke-end reduction. This allows engineers to fine-tune the end position on large-scale equipment without dismounting the cylinder or adding external hard stops. With a 50 mm diameter piston rod and a 1-inch PT port, it delivers 24544 N of push force at 0.5 MPa, scaling to a substantial 44178 N at the 0.9 MPa maximum operating pressure.
Designed as a robust tie-rod cylinder, this ISO 6430 class unit features an adjustable air cushion (40 mm length) to safely decelerate high-inertia loads. The body length A for the SCJ series is 409 mm, accommodating the stroke adjustment mechanism. It operates on filtered air (40 µm) within a standard pressure range of 0.15–1.0 MPa and a temperature range of -20 to +70 °C, making it a reliable workhorse for demanding industrial automation tasks.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X160-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 160 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. |
| ×160 | 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 by adjusting the stroke end via the rear screw, ensuring consistent product thickness without reprogramming the machine controller.
Dial in the precise push-off position for each layer on a heavy-load palletizer, compensating for pallet sag or product stack variations to achieve a perfectly aligned load every time.
During the installation of steel mill or foundry equipment, use the 30 mm adjustment range to perfectly synchronize the cylinder's end stop with the mechanical linkage, simplifying a complex setup process.
Select the SCJ250X160-30 when you need a high-force actuator with the ability to precisely dial in the stroke end position during commissioning or for format changes. If your application requires less force, consider stepping down to the 200 mm bore SCJ series, which provides 15708 N of push force at 0.5 MPa. For applications needing a fixed, non-adjustable stroke, the standard SC250 series is a more economical alternative. This model is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of the same 250 mm bore, 160 mm nominal stroke, and 30 mm adjustment range, with matching PT port threads and basic mounting. For strokes of 300 mm or greater, always evaluate side-loading and rod bending; an external guide or a guided cylinder is recommended to protect the rod and seals from premature wear.
Adjustable-stroke checklist
The push force is 24544 N at 0.5 MPa and 44178 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single-rod design, providing 23562 N at 0.5 MPa. The rear adjusting screw changes only the stroke end position and does not affect the cylinder's force output.
No, this cylinder will not hold its position if air pressure is lost or the directional valve is centered. The piston can drift or drop under load. The adjustable air cushion and stroke-end screw are not locking devices. To hold a load without live pressure, you must add a mechanical lock, an external rod brake, or a pilot-operated check valve.
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