The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X20-10 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. Ø63mm bore, 20mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X20-10 is a double-acting, single-rod pneumatic cylinder with a 63 mm bore and a 20 mm nominal stroke, featuring a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke-end reduction. This allows machine builders to fine-tune the piston stop position without changing the cylinder or adding external hard stops, making it ideal for commissioning and precise end-point calibration. At 0.5 MPa, it delivers 1559 N of push force and 1402 N on the pull stroke, driven through a 20 mm diameter piston rod.
The cylinder body has a length (A dimension) of 197 mm and uses a PT1/4 port. It includes an adjustable pneumatic cushion to decelerate the piston smoothly at the end of travel. As a tie-rod design, it is not an ISO 15552 cylinder, but it offers robust, serviceable construction for industrial automation tasks where a compact, adjustable stroke is required.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X20-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 20 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, 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. |
| ×20 | 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.
The 10 mm adjusting screw allows operators to precisely dial in the final stop position of a tooling plate or actuator, compensating for assembly tolerances without re-machining any parts.
Fine-tune the stroke end to create a precise gap for a through-beam sensor or vision system inspection station, ensuring consistent detection without mechanical interference.
As gripper pads or pressing tools wear down over thousands of cycles, the adjustable stroke can be slightly extended to maintain consistent contact pressure and part engagement.
Choose the SCJ63 bore when your application needs a push force around 1559 N at standard shop air pressure. If you require more force, stepping up to the 80 mm bore provides 2513 N of push force at the same 0.5 MPa. For applications needing less force, the 50 mm bore offers 982 N. This adjustable-stroke model is the right choice over a fixed-stroke SC cylinder when you anticipate needing to change the end-of-stroke position during setup or after mechanical wear. If your load requires a fixed, unchangeable stroke, the standard SC series is a more economical alternative.
For a direct replacement, match an AirTAC SCJ63 cylinder with a 20 mm nominal stroke, a 10 mm adjustable range, and PT ports. This model uses the basic mounting style; if you need a pivoting mount, the TC centre trunnion with a TCM1 bracket is available.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 63 mm bore cylinder generates a push force of 1559 N. The pull force on the retract stroke is 1402 N, which is lower due to the area of the 20 mm piston rod. The maximum push force at 0.9 MPa is 2805 N.
No, the SCJ63X20-10 is not designed for position holding. If air pressure is lost or the control valve is centered, the piston will drift. The adjusting screw only sets the physical stroke end, not an intermediate stop. To hold a load safely without air pressure, you must add an external rod lock or a pilot-operated check valve.
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