The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X230-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø63mm bore, 230mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X230-75 is a double-acting, single-rod pneumatic cylinder that integrates a rear-cap adjusting screw, giving you up to 75 mm of field-adjustable stroke-end reduction without swapping the unit. At 0.5 MPa, it delivers 1559 N of push force and 1402 N on the pull stroke, driven by a 20 mm diameter piston rod through PT1/4 ports.
This 63 mm bore model uses a tie-rod construction with a 28 mm air cushion for smooth deceleration. The body length A(SCJ) is 197 mm, and the adjustable screw lets operators fine-tune the end position during commissioning, format changes, or to compensate for mechanical wear, making it a practical choice for dynamic production lines.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X230-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 230 mm |
| Stroke adjustment | Up to 75 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. |
| ×230 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
The 75 mm adjustment range allows technicians to precisely dial in the stroke end position during initial machine setup without needing to fabricate custom hard stops or swap cylinders.
On packaging or assembly lines running multiple product sizes, the adjustable stroke lets operators quickly reconfigure the cylinder's end position for different box heights or part dimensions.
In clamping or pressing fixtures, the rear screw can be periodically advanced to take up slack from worn tooling or seals, maintaining consistent contact force without replacing the actuator.
Choose the SCJ63X230-75 when your application needs a robust mid-range force and the ability to dial in the stroke end precisely within a 75 mm window. If you require more force, stepping up to an 80 mm bore provides 2513 N of push at 0.5 MPa. For applications needing a fixed, non-adjustable stroke, the standard SC63 series is a simpler alternative. This model is a direct dimensional replacement for another AirTAC SCJ63 adjustable-stroke cylinder with the same 230 mm nominal stroke, 75 mm adjust range, PT ports, and basic mounting. For strokes of this length, ensure the rod is not subjected to high side loads; if lateral forces are present, use an external linear guide or switch to a guided cylinder to prevent rod bending and seal wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
No, a standard pneumatic cylinder will drift or drop if air pressure is lost or the valve is centered. The adjustable screw only sets the stroke end position and the air cushion only decelerates the piston; neither acts as a mechanical lock. To hold a load safely without live pressure, you must add an external rod brake or a pilot-operated check valve.
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