Airtac SCJ50 Standard Cylinder SCJ50X25-10FA
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X25-10FA 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, 25mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke25 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X25-10FA
The SCJ50X25-10FA is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 25 mm nominal stroke by up to 10 mm without swapping the unit. Its 50 mm bore delivers 982 N of push force at 0.5 MPa, making it a capable mid-range actuator for positioning tasks.
This model comes with a rigid FA front rectangular flange (order code F-SC50FA) for secure panel mounting, and uses the standard PT1/4 port. The 20 mm diameter piston rod and 21 mm air cushion provide smooth deceleration, while the rear adjusting screw simplifies commissioning and format changeovers.
Airtac SCJ50 Standard Cylinder SCJ50X25-10FA Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X25-10FA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 25 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 SCJ50X25-10FA
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×25 | 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 SCJ50X25-10FA Is Used
Commissioning Fine-Tuning
During machine setup, the 10 mm adjustment screw lets technicians precisely set the stroke end position to match tooling or stops without re-plumbing or changing the cylinder.
Short-Throw Part Stops
Used as a retractable stop on a conveyor line, the adjustable stroke allows operators to compensate for wear on the stop pad or to handle slightly different product sizes.
Panel-Mounted Clamping
The FA front flange securely mounts the cylinder to a fixture plate, where the adjustable stroke provides a precise, repeatable clamping distance for delicate assembly processes.
Is the Airtac SCJ50 Standard Cylinder SCJ50X25-10FA the Right Cylinder?
Choose the SCJ50X25-10FA when you need a 50 mm bore cylinder with a short 25 mm nominal stroke and the ability to dial in the exact end position within a 10 mm window. If your force requirement is lower, the 40 mm bore SCJ40 series provides 628 N push at 0.5 MPa; for higher force, step up to the 63 mm bore at 1559 N. The front flange mount is ideal for directly attaching the cylinder to a machine panel or end plate. For applications needing a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This cylinder is a direct replacement for another AirTAC SCJ50X25-10FA with PT ports and FA mount.
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 SCJ50X25-10FA FAQ
At the standard 0.5 MPa operating pressure, it delivers 982 N of push force and 825 N of pull force. The maximum push force at 0.9 MPa is 1767 N.
Yes, provided the bore, port size, and mounting match. The SCJ50X25-10FA has a 25 mm maximum stroke, adjustable down by 10 mm. It directly replaces another AirTAC SCJ50X25-10FA with an FA front flange mount and PT threads.
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