The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X250-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø250mm bore, 250mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X250-100 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 100 mm of field-adjustable stroke-end control. With a 250 mm bore, it delivers a substantial 24544 N of push force at 0.5 MPa, making it suitable for heavy-duty industrial positioning where the final stop point must be dialed in precisely during commissioning or format changes.
This ISO 6430 class tie-rod cylinder uses a 50 mm diameter piston rod and a PT1 inch port. The integrated air cushion, with a length of 40 mm, decelerates the piston smoothly, while the 100 mm adjustment range allows operators to fine-tune the stroke end without swapping the cylinder or adding external hard stops.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X250-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 100 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. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -100 | 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 large forming or laminating presses by adjusting the screw to set a precise mechanical stop, ensuring consistent part thickness without reprogramming the press controls.
Dial in the exact open or closed position of a large quarter-turn valve during commissioning. The 100 mm adjustment range compensates for mounting bracket tolerances and ensures a perfect seal without over-torquing the valve stem.
Set the opening width of a heavy-duty diverter gate on a mining or aggregate conveyor. The adjustable stroke allows operators to quickly change the material flow path for different product sizes without unbolting the cylinder.
Select the SCJ250X250-100 when you need a powerful, field-adjustable stroke end for a heavy linear motion task. If 24544 N of push force at 0.5 MPa is more than required, consider stepping down to the 200 mm bore SCJ200, which provides 15708 N of push force. For applications that do not require stroke adjustment, the fixed-stroke SC250X250 is a simpler, more cost-effective alternative. A direct replacement must match the 250 mm bore, 250 mm nominal stroke, 100 mm adjustment range, PT1 inch port thread, and basic mounting style. For this 250 mm stroke, ensure the load is guided externally to prevent side-loading and rod bending.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, the cylinder produces 24544 N of push force and 23562 N of pull force. The pull force is lower due to the area of the 50 mm piston rod. The maximum push force at the 0.9 MPa operating limit is 44178 N.
A screw mechanism in the rear cap acts as an internal, adjustable end-stop for the piston. Turning the screw changes the retracted stroke end position by up to 100 mm. It is a mechanical adjustment that sets the physical stopping point, not a speed or pressure control. If the load must be held in place without air pressure, an external rod lock or pilot-operated check valve is required.
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