The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X50-30STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 50mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The AirTAC SCJ80X50-30STC is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, offering a 30 mm adjustment range on its 50 mm nominal stroke. With an 80 mm bore, it delivers 2513 N of push force at 0.5 MPa, making it suitable for medium-duty clamping, pressing, and positioning tasks where fine-tuning the end-stop is required during commissioning or format changes.
This model features a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and a TC centre trunnion pivot for applications requiring the cylinder to swing. The 25 mm diameter piston rod and PT3/8 ports ensure robust flow, while the 28 mm air cushion decelerates the piston quietly at the stroke end. The body length A(SCJ) is 239 mm, providing a compact yet powerful package.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X50-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 28 mm |
| Max stroke | Up to 1500 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
During machine setup, the 30 mm rear adjustment screw allows engineers to precisely dial in the stroke end position for a part-present sensor or clamp, eliminating the need to machine custom stops.
On a packaging line switching between box sizes, the adjustable stroke quickly resets the pusher's end-stop. The centre trunnion mount lets the cylinder pivot, absorbing misalignment with the conveyor guide rails.
In a pressing or riveting station, the stroke can be incrementally extended over time to compensate for tooling wear, maintaining consistent joint quality without reprogramming the machine controller.
Choose the SCJ80 bore when the 40 mm bore's 628 N push force at 0.5 MPa is insufficient, but a full step to the 100 mm bore's 3927 N is unnecessary overhead. The 30 mm stroke adjustment is ideal for dialling in precise end positions without swapping the cylinder. For applications where the stroke is fixed and never needs field adjustment, a standard SC80 fixed-stroke cylinder is a more economical choice.
To replace this unit, match an SCJ80 with a 50 mm nominal stroke, a 30 mm adjustment range, PT threads, the TC centre trunnion mount (using the F-SC80TC kit), and the -S magnet. If the load creates significant side forces, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N. The push force is higher than the pull force because it is a single-rod cylinder.
Yes, provided the mounting and port configuration match. The SCJ80X50-30STC has a TC centre trunnion mount, a built-in magnet, and a 30 mm adjustable stroke range. Ensure your machine can accommodate the slightly longer SCJ body length of 239 mm and that you need the field-adjustable end-stop feature.
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