Airtac SCJ250 Standard Cylinder SCJ250X1000-10
The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X1000-10 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, 1000mm nominal stroke, PT1" ports and adjustable end cushioning.
- BoreØ250 mm
- Nominal stroke1000 mm
- Stroke adjust-10 mm
- Port sizePT1"
- Rod threadM42×2
- CushionAdjustable, 40 mm
About the Airtac SCJ250 Standard Cylinder SCJ250X1000-10
The SCJ250X1000-10 is a large-bore double-acting single-rod cylinder delivering 24544 N of push force at 0.5 MPa, built for heavy industrial applications where the stroke end must be fine-tuned on the machine. Its rear-cap adjusting screw provides up to 10 mm of stroke-end reduction without changing the cylinder body, letting commissioning teams dial in the exact stop position.
This ISO 6430 class tie-rod cylinder uses a 50 mm diameter piston rod, a PT1 inch port, and a 40 mm air cushion to decelerate high-inertia loads smoothly. The body length A(SCJ) is 409 mm, and the maximum standard stroke for this bore is 1500 mm, so the 1000 mm stroke is well within standard manufacturing limits.
Airtac SCJ250 Standard Cylinder SCJ250X1000-10 Technical Specifications
| Model | Airtac SCJ250 Standard Cylinder SCJ250X1000-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 1000 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.
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 SCJ250X1000-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 250 | Bore size in mm. |
| ×1000 | 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.
Where the Airtac SCJ250 Standard Cylinder SCJ250X1000-10 Is Used
Heavy Press End-Stop Calibration
The 10 mm rear adjustment screw lets operators fine-tune the final pressing depth on large forming or laminating presses without dismounting the cylinder, speeding up recipe changes.
Bulk Material Gate Positioning
In mining or aggregate handling, the adjustable stroke sets the exact opening of a discharge gate. The 24544 N push force at 0.5 MPa moves heavy slide plates reliably, and the stroke can be tweaked as the gate wears.
Large-Scale Test Rig Actuation
Structural test frames use the SCJ250X1000-10 to apply controlled displacement. The 10 mm adjust range allows precise zero-point setting for different specimen lengths, while the 40 mm cushion protects the load cell at retract.
Is the Airtac SCJ250 Standard Cylinder SCJ250X1000-10 the Right Cylinder?
Choose the SCJ250 when your application needs a field-adjustable stroke end in the 24544 N push force class. If your load requires slightly less force, the SCJ200 bore provides 15708 N push at 0.5 MPa; for more force, consider a larger bore or higher operating pressure up to 1.0 MPa. The adjustable-stroke SCJ is the right pick over a fixed-stroke SC when you anticipate needing to tweak the end position during setup, format changes, or after mechanical wear.
For a direct replacement, match the SCJ250 bore, 1000 mm nominal stroke, 10 mm adjust range, PT port thread, and basic mounting. At this 1000 mm stroke length, the rod is fully supported by the guide bush, but if the load applies significant side force, an external guide rail or a guided cylinder should be used to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ250X1000-10 FAQ
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N (the difference is due to the 50 mm single rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 44178 N. The theoretical maximum at 1.0 MPa is 5006 kgf.
Only if you need the adjustable stroke feature. The SCJ250X1000-10 has a longer body (A=409 mm) to accommodate the rear adjusting screw. It matches the same bore, rod, port, and cushion specs as the SC250, but the overall length is slightly greater. Ensure your mounting space can accept the extra length.
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