Airtac SCJ100 Standard Cylinder SCJ100X225-75
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X225-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø100mm bore, 225mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke225 mm
- Stroke adjust-75 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X225-75
The SCJ100X225-75 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, built around a 100 mm bore and a 25 mm diameter piston rod. Its rear-cap adjusting screw provides up to 75 mm of stroke-end retraction, letting you fine-tune the 225 mm nominal stroke without swapping the cylinder. At 0.5 MPa, it delivers 3927 N of push force and 3681 N on the pull stroke, making it a strong candidate for heavy-duty positioning tasks where the final stop point must be dialed in during commissioning or changeover.
This genuine AirTAC SCJ unit uses a PT1/2 port and an M20x1.5 rod thread, with a 29 mm air cushion to decelerate the piston quietly. The tie-rod construction keeps it serviceable, and the 75 mm adjustment range is practical for taking up tooling wear or accommodating different product heights on the same fixture. Body length A for this bore is 245 mm, providing a compact footprint for its force class.
Airtac SCJ100 Standard Cylinder SCJ100X225-75 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X225-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 75 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 29 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCJ100 Standard Cylinder SCJ100X225-75
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -75 | 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 SCJ100 Standard Cylinder SCJ100X225-75 Is Used
Commissioning & Debugging
Dial in the exact end-stop position during machine bring-up without machining new stops or shimming. The 75 mm range lets integrators quickly test different stroke lengths to optimize cycle time and placement accuracy.
Product Format Changeover
Adjust the stroke end to match a new product height or width on a packaging or assembly line. Operators can reset the stop in minutes using the rear screw, minimizing downtime between batches.
Wear Compensation
Take up mechanical play or tooling wear over time by slightly extending the effective stroke. This keeps clamping or pressing forces consistent without replacing the entire actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X225-75 the Right Cylinder?
Choose the SCJ100 when you need roughly 4000 N of push force at standard shop air and the ability to tweak the stroke end by up to 75 mm. If your load requires more force, stepping up to the 125 mm bore provides 6136 N push at 0.5 MPa; for a lighter, more compact solution, the 80 mm bore delivers 2513 N. This adjustable-stroke model is the right pick when the machine’s end-stop position is not yet final or needs periodic adjustment—if the stroke is fixed and never changes, the standard SC100 fixed-stroke cylinder is a more economical alternative. For a direct replacement, match the 100 mm bore, 225 mm nominal stroke, 75 mm adjustment range (-75), and PT port thread. At this 225 mm stroke, ensure the rod is guided externally if significant side loads are present, or consider 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 (-75)
- ✓ 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 SCJ100 Standard Cylinder SCJ100X225-75 FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. The push force is higher because the single rod reduces the piston area on the pull side. At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N.
The rear adjusting screw physically limits how far the piston rod can extend, shortening the stroke end by up to 75 mm from the 225 mm nominal maximum. It is a mechanical stop for stroke setting only—it does not lock the piston in place. If air pressure is lost, the rod can drift, so an external lock or pilot-operated check valve is required for load holding.
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