Airtac SCJ50 Standard Cylinder SCJ50X225-10
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X225-10 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. Ø50mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke225 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X225-10
The SCJ50X225-10 delivers 982 N of push force at 0.5 MPa and 825 N on the pull stroke, driven by a 20 mm piston rod through a PT1/4 port. Its rear-cap adjusting screw provides a 10 mm field-adjustable range, letting you dial in the exact stroke end position without removing the cylinder from the machine.
A 21 mm air cushion at each end decelerates the piston smoothly, and the tie-rod construction keeps the 194 mm body length (A dimension) rigid across the full 225 mm nominal stroke. The single-rod design means push force is always higher than pull force, suiting it to clamping and pressing tasks where the work stroke needs precise end-point tuning.
Airtac SCJ50 Standard Cylinder SCJ50X225-10 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X225-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCJ50 Standard Cylinder SCJ50X225-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | 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 SCJ50 Standard Cylinder SCJ50X225-10 Is Used
End-Stop Fine Tuning
The 10 mm rear screw lets commissioning engineers dial in the exact retract stop on a clamping fixture without shimming or swapping cylinders, saving hours during line setup.
Wear Compensation
On a pressing station where tooling wears gradually, the adjustable stroke end takes up the slack in 1 mm increments, keeping the press depth consistent across thousands of cycles.
Format Changeover
When a packaging machine switches between product sizes, the operator can quickly reset the cylinder stroke end to match the new box dimension without mechanical rework.
Is the Airtac SCJ50 Standard Cylinder SCJ50X225-10 the Right Cylinder?
Choose this 50 mm bore when the 40 mm bore's 628 N push at 0.5 MPa is too light but a 63 mm unit (1559 N push) would waste air. The 10 mm adjust range is ideal for fine commissioning tweaks or wear take-up on a fixed stop. If you need a fixed stroke without the rear screw, step across to the standard SC series.
For a drop-in replacement, match the 50 mm bore, 225 mm nominal stroke, 10 mm adjust range, PT1/4 port thread, and basic mounting. At 225 mm stroke, side-load is generally low, but if the rod sees any off-axis force, add an external guide rail to protect the rod bearing and seal.
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 SCJ50 Standard Cylinder SCJ50X225-10 FAQ
At 0.5 MPa it generates 982 N pushing and 825 N pulling. At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, it is a direct form-and-function replacement for any AirTAC SCJ50 with a 225 mm nominal stroke and 10 mm adjust range. Confirm your port thread is PT1/4, mounting is basic, and that you do not need a magnet. If your old unit has a -S suffix, order the magnet-equipped version.
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