The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X100-30 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø250mm bore, 100mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X100-30 is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ adjustable-stroke family, built for heavy-duty applications where the stroke end position must be fine-tuned on the machine. Its 250 mm bore generates a substantial 24544 N of push force at just 0.5 MPa, while the rear-cap adjusting screw provides up to 30 mm of stroke-end reduction, allowing operators to dial in the exact stopping point without swapping the cylinder or adding external hard stops.
This ISO 6430 class tie-rod cylinder uses a 50 mm diameter piston rod with an M42x2 male thread and a 1-inch PT port. The adjustable air cushion, with a 40 mm cushion length, decelerates the massive piston smoothly, and the body length A is 409 mm. The standard TPU seals suit operating temperatures from -20 to +70 °C, making this unit a robust, field-configurable workhorse for pressing, clamping, and positioning tasks.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X100-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 30 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. |
| -30 | 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 press depth in bearing or bushing insertion stations. The 30 mm adjustment range lets operators compensate for part tolerance stack-ups without reprogramming the press, using the cylinder's full 24544 N push force.
Deploy as an adjustable end-stop on a conveyor for large castings or pallets. The stroke-end screw allows quick repositioning of the stop point for different product sizes, handling high-impact loads with the 50 mm rod's rigidity.
Use on a large welding or assembly fixture where the clamp's closed position must be set precisely during initial setup. The rear screw provides a mechanical, tamper-resistant stroke limit, ensuring repeatable clamping force without over-travel.
Choose the SCJ250 when your application demands the highest force in the SCJ range and the flexibility to adjust the stroke end by up to 30 mm during commissioning or format changes. If 24544 N of push force at 0.5 MPa is more than required, stepping down to the 200 mm bore reduces push force to 15708 N at the same pressure, saving energy and physical space. For applications needing a fixed, non-adjustable stroke, the standard SC250 cylinder is a simpler alternative.
This model is a direct replacement for an existing AirTAC SCJ250X100-30 with PT ports and basic mounting. If your load generates significant side forces, consider adding an external guide rail system, as the 50 mm rod, while robust, is not designed to bear high lateral loads unsupported over this 100 mm stroke. For true guided motion, a guided cylinder may be a better choice.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, the push force is 24544 N and the pull force is 23562 N. Because this is a single-rod cylinder, the push force is always greater than the pull force due to the area of the 50 mm rod. The maximum theoretical force at 1.0 MPa is 5006 kgf.
Yes, but only if you need the stroke adjustment feature. The SCJ250X100-30 has a slightly longer body (A=409 mm) than a fixed-stroke SC250 to house the adjusting screw. It is a direct physical and pneumatic match for an SCJ250 of the same bore, nominal stroke, and 30 mm adjustment range. Ensure your mounting and port thread (PT) match.
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.