The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-30SFA is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-30SFA 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 30 mm field-adjustable range, letting you dial in the exact 200 mm nominal stroke end position without removing the cylinder or adding external hard stops. The 63 mm bore delivers 1559 N of push force at 0.5 MPa, making it a strong choice for medium-duty positioning tasks.
This model is factory-equipped with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and an FA front rectangular flange (F-SC63FA) for rigid panel or end-plate mounting. The 20 mm piston rod, PT1/4 ports, and 28 mm air cushion work together for reliable deceleration. With a body length A(SCJ) of 197 mm, it fits into spaces where adjustable stroke is needed without a massive footprint.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-30SFA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 30 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. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -30 | 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 30 mm rear screw adjustment lets technicians fine-tune the end position during machine commissioning without swapping cylinders, speeding up the final alignment of clamps or stops.
On packaging lines, quickly adjust the stroke end for different box or product sizes. The 1559 N push force at 0.5 MPa handles medium-weight pusher and diverter gates reliably.
In pressing or clamping fixtures, use the screw to take up mechanical wear on tooling or seals over time, maintaining consistent contact force without reprogramming the machine.
Choose this 63 mm bore when the 50 mm bore's 982 N push force at 0.5 MPa is borderline for your load, but a jump to the 80 mm bore (2513 N) would be oversized and waste air. The 30 mm adjust range is ideal for commissioning tweaks or format changeovers on a 200 mm stroke. If your application requires a fixed, non-adjustable stroke, the standard SC63X200 is a simpler, lower-cost alternative. For guided loads with high side forces, pair this with an external guide rail or consider a guided cylinder.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with a 63 mm bore, 200 mm nominal stroke, 30 mm adjust range, PT port thread, FA front flange mounting, and built-in magnet. At a 200 mm stroke, rod deflection is minimal under pure axial loads, but always align the load to prevent bending if side forces are present.
Adjustable-stroke checklist
At 0.5 MPa, it delivers 1559 N of push force and 1402 N of pull force. The maximum push force at the 0.9 MPa operating limit is 2805 N. The push force is higher than the pull force because the single piston rod reduces the effective area on the return stroke.
No. The SCJ is a standard double-acting cylinder and will drift or drop if air pressure is exhausted or lost. The adjustable screw only sets the stroke end position; it is not a mechanical lock. To hold a load without live pressure, you must add an external rod brake or a pilot-operated check valve.
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