The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X220-20S 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. Ø40mm bore, 220mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X220-20S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, giving you up to 20 mm of fine-tuning range via the rear-cap screw. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force at 0.5 MPa and up to 1130 N at 0.9 MPa, making it a capable mid-range actuator for tasks where the stroke needs to be dialled in precisely during commissioning or format changes.
This model includes a built-in magnet (-S), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing. The body length A(SCJ) is 185 mm, and it uses PT1/4 ports with an M12x1.25 rod thread. The adjustable screw sets the stroke end position within the 20 mm range, but does not alter the cylinder's force output or its 30-800 mm/s speed capability.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X220-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 220 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm. |
| ×220 | 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.
Fine-tune the end position of a conveyor stop gate during initial machine setup. The 20 mm rear screw adjustment lets technicians dial in the exact stopping point without loosening mounting bolts or fabricating shims.
Quickly adapt a packaging machine's pusher stroke for different box sizes. Operators can adjust the stroke end by up to 20 mm in seconds, minimizing downtime between production runs.
Compensate for mechanical wear in a clamping fixture over time. As tooling surfaces wear, the adjustable stroke lets you extend the cylinder's end position slightly to maintain consistent clamping pressure without replacing parts.
Choose the SCJ40X220-20S when your application benefits from on-machine stroke adjustment without swapping the cylinder. If you need more force, stepping up to a 50 mm bore SCJ provides 982 N of push at 0.5 MPa. For applications where the stroke is permanently fixed and never needs field adjustment, the standard SC40 series offers a simpler, non-adjustable alternative. This cylinder is a direct replacement for another AirTAC SCJ40 with a 220 mm nominal stroke, 20 mm adjust range, PT ports, basic mounting, and a magnet.
With a 220 mm stroke, the rod is well-supported within standard limits, but if the load applies a significant side force, consider pairing the cylinder with an external guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum operating push force at 0.9 MPa is 1130 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area on the return side.
You can, but the SCJ40X220-20S is slightly longer in body length to accommodate the rear adjusting screw. It is a direct replacement for another AirTAC SCJ40 with a 220 mm nominal stroke, 20 mm adjust range, and a magnet. If you do not need the adjustable stroke feature, the standard SC40 is a more compact, cost-effective choice.
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