The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X100-10 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, 100mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X100-10 is a double-acting, single-rod pneumatic cylinder engineered for heavy-duty applications requiring fine-tuned stroke-end positioning. Its rear-cap adjusting screw provides a 10 mm field-adjustable range, allowing operators to dial in the exact stroke end without removing the cylinder. With a 50 mm diameter piston rod and a PT1" port, this tie-rod cylinder delivers a substantial 24544 N of push force at 0.5 MPa.
This ISO 6430 class cylinder features an adjustable air cushion (40 mm length) for smooth deceleration of large inertial loads. The body length A(SCJ) is 409 mm, making it a compact yet powerful solution for stroke adjustment. The SCJ design is ideal for commissioning, format changeovers, or compensating for tooling wear in demanding industrial environments.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X100-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 100 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. |
| ×100 | 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 final pressing depth on a large hydraulic-style pneumatic press by adjusting the stroke end by up to 10 mm, ensuring consistent part forming without swapping out the massive cylinder.
Adjust the closing position of a heavy gate valve handling aggregates to compensate for seal wear over time, maintaining a tight shut-off by simply turning the rear adjusting screw.
During the setup of a heavy welding jig, dial in the exact clamping stroke for a 250mm bore cylinder on-site, accommodating slight variations in workpiece dimensions without custom machining.
Select the SCJ250 when your application demands the highest force class in the SCJ range, with a 24544 N push at 0.5 MPa. If a lower force is acceptable, stepping down to the SCJ200 bore reduces push force to 15708 N at the same pressure, potentially saving space and cost. For applications where the stroke is fixed and never needs field adjustment, the standard SC250 fixed-stroke cylinder is a simpler, more economical choice. As a direct replacement, match the 250 mm bore, 100 mm nominal stroke, 10 mm adjust range, and PT port thread. For strokes of 300 mm or more, always assess side-loading on the 50 mm rod; an external guide rail or a guided cylinder is recommended to prevent rod bending and ensure long seal life.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 24544 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 44178 N. The pull force is lower (23562 N at 0.5 MPa) due to the area of the 50 mm piston rod.
The 10 mm adjustment is made via a screw in the rear cap, which limits the piston's retraction stroke end. It is a direct dimensional replacement for an SC250 of the same bore and nominal stroke, provided the 10 mm adjustment range is sufficient for your application. The mounting, port, and rod dimensions are identical.
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