The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-50FA 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. Ø63mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X150-50FA is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides a 50 mm adjustable range, letting you dial in the exact stop position without changing the cylinder or adding external hard stops. With a 20 mm rod and PT1/4 ports, it delivers 1559 N of push force at 0.5 MPa, scaling up to 2805 N at the 0.9 MPa maximum operating pressure.
This model comes configured with an FA front rectangular flange (mounting code F-SC63FA) for secure panel or end-face mounting. The standard TPU seals and PT threads suit general industrial environments from -20 to +70 °C. The integrated air cushion, with a 28 mm cushion length, decelerates the piston smoothly, protecting the end cap during high-cycle applications.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-50FA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 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, 28 mm |
| Max stroke | Up to 1500 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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.
Dial in the perfect actuator stroke during machine commissioning. The 50 mm rear screw adjustment allows engineers to fine-tune the end position on the fly without swapping cylinders, saving hours of mechanical setup time.
Ideal for packaging or assembly lines running multiple product sizes. Operators can quickly adjust the cylinder's stroke end to accommodate a new box height or component position, reducing changeover downtime.
In high-cycle clamping or pressing fixtures, use the adjustable stroke to take up mechanical wear on tooling or seals over time. A simple turn of the screw restores the precise clamping position without replacing parts.
Choose the SCJ63 bore when your application needs roughly 1560 N of push force at standard plant air pressure. If you require more force, stepping up to the SCJ80 provides 2513 N push at 0.5 MPa; for a lighter, more compact solution, the SCJ50 delivers 982 N. This adjustable-stroke model is the right choice when commissioning requires trial-and-error positioning or when a machine must switch between two end points within the 50 mm adjustment band. For a fixed, repeatable stroke without the adjusting screw, the standard SC63 is a simpler alternative.
This 150 mm nominal stroke is well within the bore's 1500 mm maximum standard stroke, so side-load concerns are minimal for short-stroke applications. However, always ensure the load is guided externally if any radial force is present. To replace this unit, match the 63 mm bore, 150 mm nominal stroke, 50 mm adjustment range, FA front flange mounting, and PT port thread.
Adjustable-stroke checklist
The push force is 1559 N at 0.5 MPa and 2805 N at 0.9 MPa. The pull force on the single rod is slightly lower at 1402 N at 0.5 MPa because the rod reduces the effective piston area on the return stroke.
A rear-cap screw lets you shorten the stroke end by up to 50 mm from the 150 mm nominal maximum. It is a direct dimensional replacement for an SC63 of the same bore and stroke, provided you have clearance for the slightly longer SCJ body and use the same FA front flange mount and PT threads.
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