The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X375-75S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø50mm bore, 375mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X375-75S is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly into the rear cap. Its 75 mm adjustment screw lets you dial in the exact stroke end position without removing the cylinder, making it ideal for commissioning trials or applications where the stop point needs periodic tweaking. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
At 50 mm bore, this cylinder delivers 982 N of push force at 0.5 MPa and up to 1767 N at 0.9 MPa. The 20 mm diameter piston rod and 21 mm air cushion ensure smooth deceleration, while the 375 mm nominal stroke provides ample reach for material handling or clamping tasks. The body length A(SCJ) is 194 mm, and the port is PT1/4.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X375-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 375 mm |
| Stroke adjustment | Up to 75 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. |
| ×375 | Nominal (maximum) stroke length in mm. |
| -75 | 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-of-arm tooling position on a pick-and-place gantry during initial setup. The 75 mm adjustment range allows engineers to quickly dial in the perfect stop point without swapping cylinders or adding hard stops.
Deploy as a retractable part stop on a packaging conveyor. The adjustable stroke lets operators easily change the stopping position for different box sizes, with the magnet confirming the cylinder is fully retracted.
Use in a woodworking clamp where material thickness varies between batches. The rear adjusting screw provides a quick mechanical way to set the final clamp depth, ensuring consistent pressure without reprogramming a controller.
This 50 mm bore cylinder with a 75 mm adjustment range is a strong mid-range actuator. If your force requirements are lower, stepping down to the SCJ40 (628 N push at 0.5 MPa) can save space and air consumption. For higher force needs, the SCJ63 provides a significant jump to 1559 N push at the same pressure. The adjustable stroke is the key differentiator here; if your application has a fixed, unchanging stroke, a standard SC series cylinder is a more economical choice.
For a direct replacement, match the 50 mm bore, 375 mm nominal stroke, 75 mm adjustment range, PT1/4 port thread, and the built-in magnet (-S). At this stroke length, be mindful of side-loading on the 20 mm rod. If the load is not guided, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
As a single-rod cylinder, push and pull forces are different. At the standard 0.5 MPa operating pressure, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. The theoretical maximum force at 1.0 MPa is 200 kgf.
You can replace a fixed-stroke SC cylinder with this SCJ50X375-75S if you need the 75 mm field-adjustable stroke feature. The mounting footprint and port location (PT1/4) are identical. Ensure your existing mounting (basic in this case) and sensor setup are compatible with the built-in magnet. The SCJ body is slightly longer than a standard SC of the same bore to house the adjustment mechanism.
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