The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X200-100 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, 200mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X200-100 is a heavy-duty double-acting, single-rod pneumatic cylinder engineered for applications demanding both high force and precise, field-adjustable stroke end positioning. With a 250 mm bore and a nominal 200 mm stroke, this model delivers a substantial 24544 N of push force at 0.5 MPa, rising to 44178 N at the maximum operating pressure of 0.9 MPa. The defining feature is the rear-cap adjusting screw, which provides a full 100 mm of adjustment range, allowing operators to fine-tune the stroke end position without dismounting the cylinder or changing hard stops.
This ISO 6430 class tie-rod cylinder is built for robust industrial service, featuring a 50 mm diameter piston rod and a PT1" port for high flow. The body length A(SCJ) is 409 mm, and it includes an adjustable pneumatic cushion of 40 mm to decelerate large inertial loads smoothly at the end of travel. Operating on 40 µm filtered air from 0.15 to 1.0 MPa, the standard TPU seals provide a reliable temperature range of -20 to +70 °C.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X200-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 200 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. |
| ×200 | 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 in a 40-ton clamping or forming press by adjusting the rear screw, compensating for tooling wear or material thickness variations without re-tooling the entire station.
Set the exact end position of a heavy-duty diverter gate on a mining or aggregate conveyor. The 100 mm adjustment allows operators to dial in the gate angle for different material flows during commissioning.
Precisely set the retracted position of a hot-roller guide in a steel mill. The adjustable stroke enables quick format changes for different billet sizes, maximizing uptime on a continuous casting line.
Select the SCJ250 when your application requires a force output in the 24000-44000 N range, which is a significant step up from the SCJ200's 15708 N push at 0.5 MPa. The 100 mm adjustment range is ideal for commissioning large machinery or accommodating wear on heavy tooling. If your stroke requirement exceeds the 1500 mm maximum standard for this bore, a non-standard order is required. For applications with a fixed, unchanging stroke, the standard SC250 cylinder offers a simpler, more cost-effective solution without the rear adjusting mechanism.
For strokes of 200 mm and above, always evaluate the potential for side loading on the 50 mm rod. If the load is not guided and perfectly axial, an external guide rail or a switch to a guided cylinder is necessary to prevent rod bending and premature seal failure. This model is a direct replacement for another AirTAC SCJ250X200-100 cylinder with PT ports and basic mounting; ensure the adjust range, port type, and magnet option match exactly.
Adjustable-stroke checklist
The push force is 24544 N at 0.5 MPa and 44178 N at 0.9 MPa. The pull force is slightly lower due to the 50 mm rod area, providing 23562 N at 0.5 MPa. These forces are identical to a fixed-stroke SC250 cylinder of the same bore.
Yes, provided the bore, nominal stroke, and -100 adjustment range are identical. The SCJ250X200-100 is a direct form-and-function replacement for another AirTAC unit with the same code. You must also match the port thread (PT), mounting style (basic), and confirm whether a magnet (S) is needed for your sensors.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.