Airtac SCJ250 Standard Cylinder SCJ250X1000-100
The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X1000-100 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, 1000mm nominal stroke, PT1" ports and adjustable end cushioning.
- BoreØ250 mm
- Nominal stroke1000 mm
- Stroke adjust-100 mm
- Port sizePT1"
- Rod threadM42×2
- CushionAdjustable, 40 mm
About the Airtac SCJ250 Standard Cylinder SCJ250X1000-100
The SCJ250X1000-100 is a large-bore, double-acting single-rod cylinder that delivers a substantial 24544 N of push force at 0.5 MPa, making it a workhorse for heavy industrial actuation. Its defining feature is the rear-cap adjusting screw, which provides up to 100 mm of field-adjustable stroke-end reduction, allowing you to fine-tune the piston's stopping position without removing the cylinder from the machine.
This ISO 6430 class tie-rod cylinder uses a 50 mm diameter piston rod and a 1-inch PT port, with a 40 mm air cushion to decelerate the massive payload at the end of travel. The body length (A dimension) is 409 mm, and it operates reliably on filtered air from 0.15 to 1.0 MPa, with a maximum push force of 44178 N at the upper pressure limit.
Airtac SCJ250 Standard Cylinder SCJ250X1000-100 Technical Specifications
| Model | Airtac SCJ250 Standard Cylinder SCJ250X1000-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 1000 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.
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 SCJ250X1000-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 250 | Bore size in mm. |
| ×1000 | 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.
Where the Airtac SCJ250 Standard Cylinder SCJ250X1000-100 Is Used
Heavy Press End-Stop Adjustment
Fine-tune the final pressing depth on a large hydraulic-style pneumatic press by adjusting the stroke end with the rear screw, accommodating variations in tooling or material thickness without reprogramming.
Material Handling Gate Control
Control a heavy diverter gate on a conveyor system for large aggregates or pallets, where the 100 mm adjust range allows operators to perfectly match the gate's open position to different chute widths.
Commissioning Large Assembly Fixtures
During the commissioning of a large welding or assembly fixture, use the adjustable stroke to precisely set the clamping position of a massive pneumatic clamp, ensuring perfect alignment before locking in the setting.
Is the Airtac SCJ250 Standard Cylinder SCJ250X1000-100 the Right Cylinder?
Select the SCJ250X1000-100 when your application demands a powerful, long-stroke actuator with the flexibility to dial in the exact stroke end position during setup or changeovers. If you need more force, stepping up is not an option within this series; however, for a lighter, more compact solution, the SCJ200X1000-100 provides 15708 N of push force at 0.5 MPa. For applications where the stroke is fixed and will never need adjustment, a standard SC250X1000 fixed-stroke cylinder is a more economical choice.
Given the 1000 mm stroke, careful management of side loads is critical to prevent rod bending and premature seal wear. Always ensure the load is guided externally and aligned concentrically with the rod axis. A direct replacement must match the 250 mm bore, 1000 mm nominal stroke, 100 mm adjust range, PT port thread, and basic mounting configuration.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ250X1000-100 FAQ
The push force is 24544 N at 0.5 MPa and 44178 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single-rod design, providing 23562 N at 0.5 MPa. The theoretical maximum force at 1.0 MPa is 5006 kgf.
Yes, if you need the ability to adjust the stroke end by up to 100 mm. The SCJ250X1000-100 is a direct dimensional replacement for an AirTAC SCJ of the same bore, nominal stroke, and adjust range. It is not a drop-in replacement for a fixed-stroke SC cylinder, as the SCJ body is longer to house the adjusting mechanism.
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