Airtac SCJ100 Standard Cylinder SCJ100X250-50
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X250-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø100mm bore, 250mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke250 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X250-50
The SCJ100X250-50 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that lets you fine-tune the stroke end position anywhere within a 50 mm range without removing the cylinder from the machine. With a 100 mm bore, it delivers 3927 N of push force and 3681 N of pull force at 0.5 MPa, making it a strong candidate for medium-to-heavy linear tasks where commissioning adjustments or format changeovers are frequent.
The cylinder body length A(SCJ) is 245 mm, and the 25 mm diameter piston rod provides solid rigidity for the 250 mm nominal stroke. It uses PT1/2 ports and an M20x1.5 rod thread, with an adjustable air cushion of 29 mm to decelerate the piston smoothly at stroke end. The adjusting screw only alters the stroke end position; it does not change the cylinder's force output or speed capability.
Airtac SCJ100 Standard Cylinder SCJ100X250-50 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X250-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 50 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 SCJ100X250-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ100X250-50 Is Used
Commissioning & Setup
The 50 mm adjustment range allows engineers to precisely dial in the stroke end during initial machine setup without needing to fabricate custom hard stops or swap cylinders.
Product Format Changeover
Ideal for packaging or assembly lines that handle multiple product sizes. Operators can quickly adjust the cylinder's stroke end to match a new box height or part position.
Wear Compensation
In high-cycle stamping or pressing fixtures, the adjustable screw can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent end-position accuracy.
Is the Airtac SCJ100 Standard Cylinder SCJ100X250-50 the Right Cylinder?
Choose this SCJ100X250-50 when you need a robust 100 mm bore actuator with the ability to dial in the stroke end on-site. If your force requirement is lower, stepping down to an 80 mm bore (2513 N push at 0.5 MPa) can reduce air consumption and physical size. For a fixed, non-adjustable stroke, the standard SC100X250 is a simpler alternative. This model is a direct replacement for any AirTAC SCJ100X250-50 with PT ports and basic mounting. For strokes of 250 mm, ensure the rod is not subjected to high side loads; if lateral forces are present, add an external guide rail or consider a guided cylinder.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ100X250-50 FAQ
At the standard operating pressure of 0.5 MPa, the push force is 3927 N and the pull force is 3681 N (pull force is lower due to the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N. The theoretical maximum force at 1.0 MPa is 801 kgf.
A rear adjusting screw physically limits the piston's stroke end within a 50 mm range from the nominal 250 mm stroke. You pick an SCJ when the application requires field-tunable end positions for setup, format changes, or wear take-up. Choose a fixed-stroke SC cylinder if the stroke length is permanently fixed and you want a simpler, slightly more compact unit.
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