Airtac SCJ50 Standard Cylinder SCJ50X225-50
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X225-50 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. Ø50mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke225 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X225-50
The SCJ50X225-50 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. Its rear-cap adjusting screw provides a 50 mm adjustable range, letting you dial in the exact stop position for a 225 mm nominal stroke. With a 50 mm bore, it generates 982 N of push force at 0.5 MPa and up to 1767 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 20 mm diameter piston rod.
This tie-rod cylinder uses PT1/4 ports and an M16x1.5 rod thread, with a 21 mm air cushion at each end to decelerate the piston quietly. The SCJ body length A measures 194 mm, making it a compact solution for applications where the stroke must be tuned during commissioning or format changes. It is not an ISO 15552 cylinder, but it is a direct dimensional match for replacing an existing AirTAC SCJ50X225-50 with the same port and mounting configuration.
Airtac SCJ50 Standard Cylinder SCJ50X225-50 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X225-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 50 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 SCJ50X225-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | 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 SCJ50 Standard Cylinder SCJ50X225-50 Is Used
Commissioning & Setup
During machine bring-up, the 50 mm adjustment screw lets technicians quickly fine-tune the stroke end position to match tooling or workpiece variations without dismounting the cylinder.
Product Changeover
On packaging or assembly lines running multiple SKUs, operators can adjust the stop position to accommodate different product heights or widths, reducing changeover time.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear on contact surfaces over time, maintaining consistent clamping force without replacing hard stops.
Is the Airtac SCJ50 Standard Cylinder SCJ50X225-50 the Right Cylinder?
Choose the SCJ50X225-50 when your machine needs a 225 mm nominal stroke with the ability to shorten the end position by up to 50 mm on the fly. If your force requirement is lower, stepping down to the 40 mm bore reduces push force to 628 N at 0.5 MPa; for higher force, the 63 mm bore delivers 1559 N. Because this is a 225 mm stroke, ensure the rod is not subjected to high side loads—if lateral forces are present, pair the cylinder with an external guide rail or switch to a guided cylinder. For fixed-stroke applications without the need for field adjustment, the standard SC50X225 is a simpler alternative. This model is a drop-in replacement for another AirTAC SCJ50X225-50 with PT threads and basic mounting.
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 SCJ50 Standard Cylinder SCJ50X225-50 FAQ
At 0.5 MPa, the cylinder produces 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N. The adjustable screw sets the stroke end position and does not alter these force values.
Pick the SCJ when you need to fine-tune the stroke end position in the field—for example, during commissioning, format changes, or to compensate for wear. The rear screw provides up to 50 mm of adjustment on this model. If your stroke is fixed and never needs field changes, the standard SC fixed-stroke cylinder is a more economical choice.
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