Airtac SCJ50 Standard Cylinder SCJ50X50-50FA
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-50FA 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, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-50FA
The SCJ50X50-50FA is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly on the machine. Its rear-cap adjusting screw provides a full 50 mm of adjustment range, allowing you to dial in the exact stroke end position for commissioning or changeover without swapping the cylinder. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force at 0.5 MPa, making it a robust choice for positioning tasks.
This model comes configured with an FA front rectangular flange (mounting code F-SC50FA) for secure panel or end-face mounting. The body length A is 194 mm, and it includes an adjustable air cushion for smooth deceleration. Operating on filtered air from 0.15 to 1.0 MPa, the standard TPU seals provide a reliable temperature range of -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X50-50FA Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-50FA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 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 SCJ50X50-50FA
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SCJ50X50-50FA Is Used
Commissioning & Setup
The 50 mm adjustment range lets technicians fine-tune the end-stop position during initial machine setup, eliminating the need to fabricate shims or swap out fixed-stroke cylinders to achieve the perfect actuator travel.
Format Changeover
Quickly adapt the cylinder's stroke for different product sizes on a packaging or assembly line. The rear screw adjustment allows operators to change the stopping position in seconds, minimizing downtime between production runs.
Wear Compensation
In clamping or pressing operations, the adjustable stroke can be extended over time to compensate for tooling or pad wear, maintaining consistent contact force and part quality without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-50FA the Right Cylinder?
Choose the SCJ50 when your application needs around 982 N of push force at standard plant pressure. If your load requires more force, stepping up to the 63 mm bore provides 1559 N of push force at the same 0.5 MPa. For applications where the stroke never needs field adjustment, the simpler fixed-stroke SC50 cylinder is a more economical alternative. This SCJ50X50-50FA is a direct replacement for any AirTAC SCJ50 with a 50 mm nominal stroke, 50 mm adjustment range, PT ports, and FA front flange 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 SCJ50X50-50FA FAQ
The theoretical push force at 0.5 MPa is 982 N, and the pull force on the rod side is 825 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 1767 N. This force difference is because the single rod reduces the effective piston area on the return stroke.
Yes, you can replace an SC50 with an SCJ50X50-50FA if you need the ability to adjust the stroke end. The mounting footprint and port locations are identical. Just ensure the 50 mm adjustment range is suitable, and match the mounting style—this model uses the FA front flange.
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