The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X250-10S 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. Ø50mm bore, 250mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X250-10S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 10 mm of retraction from the 250 mm nominal stroke, enabling fine-tuning without removing the cylinder. Its 50 mm bore delivers 982 N of push force at 0.5 MPa, driven through a 20 mm diameter piston rod.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection. The tie-rod construction uses a PT1/4 port and an M16x1.5 rod thread. The adjustable cushion decelerates the piston smoothly, and the body length A(SCJ) is 194 mm, making it a compact solution for commissioning and format changeovers.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X250-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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 end-stop position during machine commissioning. The 10 mm adjustment screw allows operators to quickly dial in the exact stroke length needed for a new process without swapping out the cylinder or machining custom stops.
Compensate for mechanical wear in clamping or pressing fixtures. As tooling surfaces wear down over time, the adjustable stroke can be extended slightly to maintain consistent contact pressure and part quality.
Adapt to different product sizes on a packaging or sorting line. The adjustable stroke lets a single actuator handle multiple product formats by quickly changing the pusher or stopper's end position.
Choose the SCJ50X250-10S when you need to dial in a precise stroke end position during setup or after tooling wear. If 982 N of push force at 0.5 MPa is insufficient, stepping up to the 63 mm bore provides 1559 N. For applications requiring a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This cylinder is a direct replacement for another AirTAC SCJ adjustable-stroke unit with a 50 mm bore, 250 mm nominal stroke, 10 mm adjustment range, PT ports, and a built-in magnet. For strokes of this length, ensure the load is guided to prevent side-loading and rod bending; consider an external guide rail or a guided cylinder if lateral forces are present.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder produces 982 N of push force and 825 N of pull force. The maximum operating pressure is 1.0 MPa, yielding a theoretical push force of up to 1767 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
A rear-cap screw limits the piston's extension, letting you shorten the stroke end by up to 10 mm from the 250 mm nominal maximum. It is a direct replacement for an SCJ of the same bore, nominal stroke, and adjustment range. If you do not need adjustability, a fixed-stroke SC50X250 is a more cost-effective alternative.
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