The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X500-10 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, 500mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X500-10 is a large-bore, double-acting single-rod pneumatic cylinder engineered for heavy-duty applications requiring precise, field-adjustable stroke end positioning. With a 250 mm bore and a nominal 500 mm stroke, this model delivers a substantial push force of 24544 N at 0.5 MPa, scaling up to 44178 N at the maximum operating pressure of 0.9 MPa. The rear-cap adjusting screw provides a 10 mm range to fine-tune the stroke end, making it ideal for commissioning large-scale equipment or compensating for wear in demanding industrial environments.
This ISO 6430 class tie-rod cylinder features a 50 mm diameter piston rod with an M42x2 thread and a PT 1 inch port for robust air connections. The unit incorporates an adjustable pneumatic cushion with a 40 mm length to decelerate high-inertia loads smoothly at the end of travel. The body length A for this SCJ configuration is 409 mm, and the standard operating speed range for this bore class is 30-500 mm/s, ensuring controlled, powerful motion for the most challenging automation tasks.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X500-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 500 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. |
| ×500 | 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 clamping stroke on a large hydraulic-style pneumatic press by up to 10 mm to accommodate variations in workpiece thickness or tooling wear, ensuring consistent high-force clamping without mechanical stops.
Adjust the end position of a diverter gate or chute in bulk material handling. The 10 mm adjustment allows operators to perfectly align the gate with different conveyor sections during setup or after maintenance.
Use the adjustable stroke end to precisely set the position of a heavy-duty guide roller in a steel processing line. The screw adjustment simplifies the initial calibration and allows for quick tweaks during product changeovers.
Select the SCJ250X500-10 when your application demands the highest force output in the SCJ family, with the added benefit of a 10 mm field-adjustable stroke end for fine-tuning. If a higher force is needed, a larger bore would be required; for a step down in force, the SCJ200 series provides 15708 N of push force at 0.5 MPa. For applications where the stroke end does not need field adjustment, a fixed-stroke SC250X500 cylinder is a more economical alternative. This model is a direct replacement for an existing AirTAC SCJ250X500-10 with PT threads and basic mounting.
Given the 500 mm stroke length, carefully evaluate the potential for side loading and rod deflection, especially with heavy or off-centre loads. For optimal service life, use an external guide rail or consider a guided cylinder assembly to absorb transverse forces and prevent bending of the 50 mm rod.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 24544 N and the pull force is 23562 N. The pull force is lower due to the area of the 50 mm piston rod. At the maximum operating pressure of 0.9 MPa, the push force increases to 44178 N.
It is a direct dimensional match for another AirTAC SCJ250X500-10 cylinder with PT ports and basic mounting. The 10 mm stroke adjustment range is a key specification to verify. This is a single-rod, tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profile cylinders.
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