The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X230-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø50mm bore, 230mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X230-40S is a double-acting, single-rod pneumatic cylinder that puts stroke-end tuning directly in your hands. Its rear-cap adjusting screw provides a 40 mm adjustment range, letting you fine-tune the 230 mm nominal stroke on the fly without swapping the cylinder or adding external hard stops. With a 20 mm diameter piston rod and PT1/4 ports, it delivers 982 N of push force at 0.5 MPa and up to 1767 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable, non-contact position sensing. The body length A for this SCJ configuration is 194 mm, and the integrated air cushion decelerates the piston smoothly at both ends. It is a genuine AirTAC component built for iterative commissioning, format changeovers, and applications where the final stroke length must be dialed in precisely on the machine.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X230-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 230 mm |
| Stroke adjustment | Up to 40 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.
| 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×230 | Nominal (maximum) stroke length in mm. |
| -40 | 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 exact stroke end position during machine bring-up without machining new stops. The 40 mm adjustment range allows engineers to test multiple positions quickly and lock in the optimal setting.
Adjust the push-off or stop position for different product sizes on a packaging line. Operators can fine-tune the cylinder stroke end in seconds to accommodate a new box or tray format.
Compensate for mechanical wear in tooling or gripper fingers over time. The rear adjusting screw can be advanced slightly to restore the precise end position without replacing the actuator.
Choose the SCJ50X230-40S when you need to empirically set a stroke end position within a 40 mm window. If your force requirement is lower, stepping down to the 40 mm bore (628 N push at 0.5 MPa) saves space and air consumption; for higher force, the 63 mm bore provides 1559 N push at the same pressure. If the stroke length is fixed and will never need field adjustment, a standard SC fixed-stroke cylinder is a simpler, more cost-effective choice. For direct replacement, match the 50 mm bore, 230 mm nominal stroke, 40 mm adjust range, PT port thread, and the built-in magnet (-S suffix). At this stroke length, ensure the rod is not subjected to significant side loads; if lateral forces are present, add an external guide rail or consider a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, it generates 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N. The pull force is lower because the 20 mm piston rod reduces the effective area on the return stroke.
Only if you never need to change the stroke end position. The SCJ's rear adjusting screw provides up to 40 mm of field-adjustable stroke-end tuning, which is essential for applications requiring fine setup, format changes, or wear take-up. A standard SC has a fixed, non-adjustable stroke.
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