The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X200-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X200-50S is a 40 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke. A rear-cap adjusting screw allows the stroke end position to be shortened by up to 50 mm, giving a true working stroke range of 150-200 mm. This model includes a built-in magnet, enabling direct mounting of CMSG/DMSG/EMSG sensors for electronic end-of-stroke detection without external brackets.
At 0.5 MPa, it delivers 628 N of push force and 528 N on the pull stroke, driven by a 16 mm diameter piston rod. The cylinder body length (A dimension) is 185 mm, and it features a 21 mm air cushion for smooth deceleration. The PT1/4 port and M12x1.25 rod thread make it a direct fit for standard pneumatic circuits requiring mid-range force and on-machine stroke tuning.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X200-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 50 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. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -50 | 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-stop position during initial machine setup without swapping cylinders. The 50 mm adjustment range allows engineers to dial in the exact stroke needed for a new fixture or tool, saving hours of mechanical rework.
Quickly adjust the stroke for different product sizes on a packaging line. A single SCJ40X200-50S can be reset in seconds to handle a new box height or width, eliminating the need for multiple fixed-stroke cylinders and change parts.
Take up mechanical play or seal wear in a clamping or pressing station. As tooling surfaces wear down, the rear adjusting screw can be advanced to restore the precise pressing depth, extending the service life of the tooling without disassembly.
This 40 mm bore model suits applications needing up to 628 N of push force at standard shop air. If your load requires more force, stepping up to the 50 mm bore (SCJ50) provides 982 N of push force. For purely fixed-stroke applications, the standard SC series offers the same mounting and force characteristics without the adjustable screw. When replacing an existing SCJ40X200-50S, match the 40 mm bore, 200 mm nominal stroke, 50 mm adjustment range, PT port thread, and the -S magnet option to ensure sensor compatibility.
At a 200 mm stroke, the 16 mm rod is well-supported within the cylinder, but if the load applies significant side force, consider adding an external linear guide or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, the cylinder provides 628 N of push force and 528 N of pull force. The maximum push force at the 1.0 MPa rated pressure is 1130 N. The pull force is lower because the 16 mm piston rod reduces the effective piston area on the return stroke.
Yes, the SCJ40X200-50S shares the same bore, port size (PT1/4), and basic mounting footprint as the SC series. The body is slightly longer to house the adjusting screw, so ensure you have clearance at the rear cap. The -S magnet option must be matched if your existing setup uses magnetic sensors.
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