The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X50-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø32mm bore, 50mm nominal stroke, PT1/8 ports and adjustable end cushioning.
The SCJ32X50-20S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 50mm nominal stroke by up to 20mm without replacing the unit. With a 12mm rod and PT1/8 ports, it delivers 402 N of push force at 0.5 MPa, making it a compact workhorse for light automation tasks.
This model includes a built-in magnet (-S suffix), so you can directly mount CMSG, DMSG, or EMSG reed and solid-state sensors on the tie-rod barrel for precise end-of-stroke detection. The adjustable rear screw is purely a mechanical stroke-end stop, ideal for commissioning tweaks or format changeovers on small assembly fixtures.
| Model | Airtac SCJ32 Standard Cylinder SCJ32X50-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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. |
|---|---|
| 32 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -20 | 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 20mm adjustment range lets technicians dial in the exact stroke end-stop on a new machine without swapping cylinders or machining spacers, speeding up initial build and debug.
Fine-tune the ejector stroke on a pick-and-place module to handle delicate components, using the rear screw to prevent over-travel that could damage the part.
Adjust the opening angle of a small diverter gate on a conveyor line. The built-in magnet provides sensor feedback to confirm the gate is fully open or closed.
Choose the SCJ32X50-20S when you need a compact, sensor-ready cylinder with a stroke you can dial in on the machine. If you require more force, stepping up to a 40mm bore provides 628 N of push force at the same 0.5 MPa pressure. For applications needing a fixed, non-adjustable stroke, the standard SC32X50-S is the direct alternative.
This cylinder is a direct replacement for any AirTAC SCJ32X50-20S with PT ports, a basic mount, and a magnet. For strokes of 300mm or more, even on a 32mm bore, assess the rod for side-loading and consider an external guide rail to prevent bending.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 402 N and the pull force is 345 N. The force increases with pressure, reaching 724 N of push force at the maximum operating pressure of 0.9 MPa.
Yes, the SCJ32X50-20S has the same bore, port, and mounting dimensions as an SC32. The body length A is 182mm, which is slightly longer to house the adjusting screw. It is a direct fit if you have space for the extra length and want the added adjustability.
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