Airtac SCJ250 Standard Cylinder SCJ250X150-30
The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X150-30 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, 150mm nominal stroke, PT1" ports and adjustable end cushioning.
- BoreØ250 mm
- Nominal stroke150 mm
- Stroke adjust-30 mm
- Port sizePT1"
- Rod threadM42×2
- CushionAdjustable, 40 mm
About the Airtac SCJ250 Standard Cylinder SCJ250X150-30
The SCJ250X150-30 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, delivering 24544 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 30 mm of fine-tuning on the stroke end position, making it ideal for commissioning large-scale equipment or accommodating wear in heavy-duty tooling without replacing the cylinder.
This ISO 6430 class tie-rod cylinder features a 50 mm diameter piston rod, a 40 mm cushion length for controlled deceleration, and a body length A of 409 mm. The 1-inch PT port supplies ample flow for the 250 mm bore, which can generate a maximum theoretical force of 5006 kgf at 1.0 MPa.
Airtac SCJ250 Standard Cylinder SCJ250X150-30 Technical Specifications
| Model | Airtac SCJ250 Standard Cylinder SCJ250X150-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 150 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.
Theoretical Output Force (Ø250mm)
| 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.
Model Code: Airtac SCJ250 Standard Cylinder SCJ250X150-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 250 | Bore size in mm. |
| ×150 | 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.
Where the Airtac SCJ250 Standard Cylinder SCJ250X150-30 Is Used
Heavy Press Tooling Setup
Fine-tune the pressing depth on large forming or stamping dies during commissioning. The 30 mm adjustment range allows operators to dial in the exact stroke end for consistent part quality without mechanical shims.
Material Handling Gate Adjustment
Control the opening of a diverter gate on a heavy-duty conveyor line. The adjustable stroke compensates for wear on the gate seal over time, maintaining a positive shut-off without reprogramming the machine controller.
Large Clamp Stroke Take-Up
Compensate for variations in workpiece thickness on a structural welding fixture. The rear adjusting screw lets the operator quickly set the clamp's final closed position, ensuring secure holding force on each assembly.
Is the Airtac SCJ250 Standard Cylinder SCJ250X150-30 the Right Cylinder?
Choose the SCJ250 when your application requires a substantial push force of 24544 N at standard plant pressure, with the added benefit of a 30 mm adjustable stroke end for precise mechanical setup. If your force requirements are slightly lower, the SCJ200 bore provides 15708 N of push force at 0.5 MPa in a more compact body. For applications needing a fixed, non-adjustable stroke, the standard SC series is a direct alternative. A direct replacement must match the 250 mm bore, 150 mm nominal stroke, 30 mm adjustment range, and 1-inch PT port thread.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ250 Standard Cylinder SCJ250X150-30 FAQ
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. The push force is higher because the single piston rod reduces the effective area on the return stroke. The maximum push force at the 0.9 MPa operating limit is 44178 N.
Yes, provided the bore, nominal stroke, and port thread match. The SCJ250X150-30 has the same mounting footprint as an SC250X150 but includes a rear adjusting screw that shortens the stroke end by up to 30 mm. Ensure the extra body length for the screw mechanism fits your machine envelope.
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