The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X500-100S 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, 500mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X500-100S is a large-bore, 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 100 mm of stroke-end reduction, making it ideal for heavy-duty applications where the end position must be fine-tuned during commissioning or format changes without replacing the cylinder. The 50 mm diameter piston rod and PT 1 inch ports ensure robust air flow for demanding industrial tasks.
This ISO 6430 class tie-rod cylinder features a built-in magnet (denoted by the -S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors for precise end-of-stroke position feedback. With a 40 mm air cushion and a body length of 409 mm, it is engineered for reliable deceleration of high-inertia loads. Operating on 40 µm filtered air from 0.15 to 1.0 MPa, this genuine AirTAC unit is a versatile solution for heavy automation cells.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X500-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 500 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. |
| ×500 | 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 bottom-dead-center position of a large forming press by adjusting the rear screw up to 100 mm, accommodating different tooling heights or material thicknesses without disassembling the actuator.
Control the opening of a diverter gate on a heavy-duty conveyor for mining or aggregate. The adjustable stroke allows operators to set the precise gate opening for different material flow rates during initial setup.
Actuate a high-torque butterfly valve and use the 100 mm adjustment range to perfectly dial in the open and closed positions, compensating for linkage wear or slight misalignments during commissioning.
Choose the SCJ250 bore when your application requires a push force between roughly 24544 N (at 0.5 MPa) and 44178 N (at 0.9 MPa). If your force requirement is lower, stepping down to a 200 mm bore reduces push force to 15708 N at 0.5 MPa, saving energy and physical space. For a fixed stroke length, the standard SC series is a simpler alternative, but the SCJ is the correct choice when you need to adjust the stroke end by up to 100 mm on the machine. A direct replacement must match the 250 mm bore, 500 mm nominal stroke, 100 mm adjustment range, PT port thread, and built-in magnet. For this 500 mm stroke, use an external guide rail or a guided cylinder to prevent rod bending and absorb side loads, ensuring long seal life.
Adjustable-stroke checklist
The theoretical 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 50 mm rod area, providing 23562 N at 0.5 MPa. These values are identical to the fixed-stroke SC250 series.
No. Like all standard pneumatic cylinders, the SCJ250X500-100S will drift or drop if air pressure is lost or the control valve is centered. The rear adjusting screw only sets the stroke end position and does not act as a mechanical lock. You must add an external rod brake or pilot-operated check valve for load holding.
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