The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X200-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø250mm bore, 200mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X200-50 is a heavy-duty double-acting single-rod cylinder delivering 24544 N of push force at 0.5 MPa, built for large-scale industrial automation where stroke end position must be fine-tuned on the machine. Its rear-cap adjusting screw provides a 50 mm adjustable range, letting commissioning engineers dial in the exact stroke end without swapping the cylinder or adding external hard stops.
This ISO 6430 class tie-rod cylinder features a 50 mm piston rod, 1 inch PT ports, and a 40 mm adjustable air cushion for smooth deceleration of high-inertia loads. With a body length A of 409 mm and a maximum standard stroke of 1500 mm, it handles demanding applications in steel processing, heavy presses, and bulk material handling.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X200-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 50 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. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
Dial in the exact pressing depth on hydraulic-pneumatic press conversions. The 50 mm screw adjustment lets operators compensate for tooling wear and material thickness variations without dismantling the press, maintaining consistent part quality across long production runs.
Control discharge gate opening on silos and hoppers with precision. The adjustable stroke end allows operators to fine-tune material flow rates by setting the exact gate position, adapting to different bulk densities and throughput requirements on the fly.
Set precise roll gaps in steel processing lines where product thickness changes between batches. The SCJ250's 50 mm adjustment range enables quick changeovers between different gauge materials, reducing downtime and eliminating the need for shim-based mechanical stops.
Select the SCJ250X200-50 when you need field-adjustable stroke end positioning in the 24544 N push force class. If your application requires less force, step down to the SCJ200 bore offering 15708 N push at 0.5 MPa; for even higher force requirements, confirm larger bore availability from the datasheet. The 50 mm adjustment range is ideal for commissioning trials, wear take-up, and format changeovers on heavy tooling.
For applications where the stroke is fixed and never needs field adjustment, the standard SC250 fixed-stroke cylinder provides the same force output without the adjusting mechanism. If the 200 mm stroke creates side-loading concerns, pair this cylinder with an external guide rail or consider a guided cylinder solution. Direct replacement requires matching the SCJ250 bore, 200 mm nominal stroke, 50 mm adjust range, PT port thread, and basic mounting configuration.
Adjustable-stroke checklist
At 0.5 MPa, the SCJ250X200-50 produces 24544 N push force and 23562 N pull force (pull is lower due to the 50 mm rod area). At 0.7 MPa, push force increases to 34361 N. The maximum operating pressure of 1.0 MPa delivers 44178 N push force. The 50 mm adjusting screw sets the stroke end position only and does not alter the force output.
The SCJ250X200-50 can replace an SC250 fixed-stroke cylinder only if the application can accommodate the slightly longer body length A of 409 mm (due to the rear adjusting mechanism) and you need the 50 mm field-adjustable stroke end feature. You must match the 200 mm nominal stroke, 1 inch PT ports, and basic mounting. If your current cylinder uses FB flange or CA/CB clevis mounts, note that SCJ does not support these mounting styles—use FA, LB, or TC instead.
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