Airtac SCJ250 Standard Cylinder SCJ250X100-100
The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X100-100 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, 100mm nominal stroke, PT1" ports and adjustable end cushioning.
- BoreØ250 mm
- Nominal stroke100 mm
- Stroke adjust-100 mm
- Port sizePT1"
- Rod threadM42×2
- CushionAdjustable, 40 mm
About the Airtac SCJ250 Standard Cylinder SCJ250X100-100
The SCJ250X100-100 is a heavy-duty, double-acting single-rod cylinder from the ISO 6430 class, delivering a substantial 24544 N of push force at just 0.5 MPa. Its defining feature is a rear-cap adjusting screw that provides a full 100 mm of field-adjustable stroke reduction, allowing engineers to fine-tune the end position for large-scale automation without swapping the cylinder or adding bulky external stops.
With a 50 mm diameter piston rod and a 40 mm air cushion, this tie-rod cylinder is built for high-force, controlled deceleration. The body length A(SCJ) is 409 mm, and it operates on filtered air from 0.15 to 1.0 MPa, making it a robust solution for demanding industrial tasks where precise stroke-end setup is critical.
Airtac SCJ250 Standard Cylinder SCJ250X100-100 Technical Specifications
| Model | Airtac SCJ250 Standard Cylinder SCJ250X100-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 100 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 SCJ250X100-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 250 | Bore size in mm. |
| ×100 | 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 SCJ250X100-100 Is Used
Heavy Press End-Stop Adjustment
The 100 mm adjustment range allows operators to quickly recalibrate the final pressing position on a large hydraulic-style pneumatic press for different material thicknesses, eliminating the need for mechanical shims.
Large Valve Actuation Setup
During commissioning of a high-torque butterfly valve, the adjustable stroke lets technicians dial in the exact open and closed positions of the actuator on-site, compensating for linkage tolerances.
Material Handling Gate Control
For a diverter gate on a heavy aggregate conveyor, the stroke can be fine-tuned to match the precise gate opening required for a new material mix, preventing jams and ensuring consistent flow.
Is the Airtac SCJ250 Standard Cylinder SCJ250X100-100 the Right Cylinder?
Choose the SCJ250 when your application requires a force in the 24 kN class at standard plant pressure. If your force needs are slightly lower, stepping down to the 200 mm bore provides 15708 N of push at 0.5 MPa, which may offer a more compact and cost-effective solution. For a fixed, non-adjustable stroke, the standard SC250 is the direct alternative.
This model is a direct replacement for another AirTAC SCJ250 adjustable-stroke cylinder with a 100 mm nominal stroke, a 100 mm adjust range, and PT ports. For strokes of 300 mm or more, always evaluate side-loading on the 50 mm rod; an external guide rail or a switch to a guided cylinder is recommended to prevent rod bending and premature seal wear.
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 SCJ250X100-100 FAQ
At 0.7 MPa operating pressure, the SCJ250 cylinder generates a push force of 34361 N. The pull force on the retract stroke is 23562 N, which is lower due to the area of the 50 mm piston rod.
Yes, if you need the ability to adjust the stroke end. The SCJ250X100-100 has the same bore, port size (PT1"), and mounting footprint as an SC250 with a 100 mm stroke, but its body length A(SCJ) is 409 mm to accommodate the rear adjusting screw mechanism. Ensure the extra length fits your machine.
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