Airtac SCJ250 Standard Cylinder SCJ250X100-100S
The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X100-100S 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 SCJ250X100-100S
The SCJ250X100-100S is a double-acting, single-rod pneumatic cylinder engineered for heavy-duty applications requiring precise, field-adjustable stroke termination. Its rear-cap adjusting screw provides up to 100 mm of stroke-end reduction, allowing operators to fine-tune the piston's stopping position from the nominal 100 mm maximum without dismounting the cylinder. With a 50 mm diameter piston rod and a substantial push force of 24544 N at 0.5 MPa, this tie-rod cylinder handles large inertial loads with authority.
Equipped with a built-in magnet, this model is ready for direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for reliable end-of-stroke position feedback. The unit operates on filtered air from 0.15 to 1.0 MPa across a standard temperature range of -20 to +70 °C, with a 40 mm adjustable air cushion to decelerate the massive piston assembly smoothly. Its body length A(SCJ) measures 409 mm, providing a robust platform for industrial machinery.
Airtac SCJ250 Standard Cylinder SCJ250X100-100S Technical Specifications
| Model | Airtac SCJ250 Standard Cylinder SCJ250X100-100S |
|---|---|
| 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 SCJ250X100-100S
| 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 SCJ250X100-100S Is Used
Heavy Press Tooling
Fine-tune the pressing depth in large hydraulic or pneumatic shop presses during die setup and changeover, using the 100 mm adjustment to accommodate different tool heights without mechanical stops.
Mining Conveyor Diverters
Adjust the stroke end of heavy-duty diverter gates in mining or aggregate handling to precisely align with multiple chute positions, compensating for wear on the gate blade over time.
Steel Mill Roller Guides
Set the precise opening of roller guides in a steel rolling mill, where the 24544 N force manages heavy billets and the adjustable stroke allows for quick recalibration between product sizes.
Is the Airtac SCJ250 Standard Cylinder SCJ250X100-100S the Right Cylinder?
Choose the SCJ250 series when your application demands the highest force output in the adjustable-stroke range, delivering 24544 N of push at 0.5 MPa. If your force requirements are slightly lower, stepping down to the SCJ200 bore provides 15708 N of push, which may offer a more compact and cost-effective solution for less demanding tasks. The 100 mm adjustment range is ideal for processes that undergo frequent format changes or require precise mechanical end-stop tuning during commissioning.
For replacement, match this model exactly to another SCJ250X100-100S cylinder to ensure identical bore, nominal stroke, 100 mm adjust range, PT port threads, and the integrated magnet for sensor compatibility. If the cylinder rod is subjected to significant side loads, even at this 100 mm stroke, consider implementing an external guide rail or switching to a guided cylinder 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 SCJ250X100-100S FAQ
At 0.5 MPa operating pressure, this cylinder produces 24544 N of push force and 23562 N of pull force. The difference is due to the 50 mm piston rod reducing the effective area on the return stroke.
A rear-cap screw mechanically limits the piston's stroke end by up to 100 mm from its nominal 100 mm maximum. It is a physical stop for fine-tuning, not a locking device. The cylinder will not hold its position if air pressure is lost; an external rod brake or pilot-operated check valve is required for load holding.
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