Airtac SCJ50 Standard Cylinder SCJ50X250-10
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X250-10 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, 250mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke250 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X250-10
The SCJ50X250-10 is a 50 mm bore double-acting single-rod cylinder that lets you fine-tune the stroke end position by up to 10 mm using the rear-cap adjusting screw, eliminating the need for external hard stops during commissioning or format changes. With a 20 mm rod and PT1/4 ports, it delivers 982 N of push force at 0.5 MPa and can reach 1767 N at 0.9 MPa.
Its 250 mm nominal stroke is well within the 1200 mm maximum for this bore, and the 21 mm air cushion at each end decelerates the piston smoothly. The tie-rod body (A length 194 mm) accepts the SCJ mounting subset—FA front flange, LB foot, or TC centre trunnion—but not FB or CA/CB styles. This model is basic-mounted, TPU-sealed, and uses standard PT threads.
Airtac SCJ50 Standard Cylinder SCJ50X250-10 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X250-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 250 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 SCJ50X250-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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 SCJ50X250-10 Is Used
Commissioning Fine-Tuning
During machine setup, the 10 mm rear adjuster lets technicians dial in the exact stroke end position without remachining brackets or adding shims, speeding up the commissioning process.
Wear Take-Up on Stops
In high-cycle material handling, the adjustable stroke compensates for wear on the tooling or workpiece contact face over time, maintaining precise positioning without replacing the cylinder.
Format Changeover
For packaging or assembly lines running multiple product sizes, operators can quickly adjust the stroke end to match a new format, reducing changeover time compared to swapping fixed-stroke cylinders.
Is the Airtac SCJ50 Standard Cylinder SCJ50X250-10 the Right Cylinder?
Choose this 50 mm bore when your application needs roughly 982 N of push force at standard plant air. If you require more force, step up to the 63 mm bore (1559 N push at 0.5 MPa); for a lighter, more compact solution, the 40 mm bore provides 628 N. The 10 mm adjustment range is ideal for fine end-stop tuning on a machine that already has a defined stroke window.
For a fixed-stroke application where no field adjustment is needed, the standard SC50X250 is a simpler, cost-effective alternative. This SCJ replaces any AirTAC SCJ50X250-10 with the same PT port thread, basic mounting, and no magnet. At 250 mm stroke, the rod is well-supported, but if your load applies a significant side force, pair the cylinder with an external guide rail or switch to a guided cylinder to prevent rod bending.
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 SCJ50X250-10 FAQ
At 0.5 MPa, this 50 mm bore cylinder produces 982 N of push force and 825 N of pull force (the difference is due to the 20 mm single rod). At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 200 kgf. The 10 mm stroke adjuster does not change the force output.
Yes, this is a direct dimensional and performance match for any AirTAC SCJ50X250-10 with PT ports, basic mounting, TPU seals, and no magnet. Ensure your replacement unit matches the original's bore, nominal stroke, 10 mm adjust range, and port thread to guarantee drop-in compatibility.
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