The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X150-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø80mm bore, 150mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X150-40 is an 80mm bore double-acting single-rod air cylinder with a rear-cap adjusting screw that provides a 40mm field-adjustable stroke range. At 0.5 MPa it delivers 2513 N push and 2268 N pull, making it a robust mid-range actuator for tasks where the stroke end must be fine-tuned during commissioning or format changes without swapping the cylinder.
This tie-rod cylinder uses a 25mm diameter piston rod, PT3/8 ports, and an M20x1.5 rod thread. The adjustable air cushion is 28mm long, and the SCJ body length A dimension is 239mm. The maximum standard stroke for this bore is 1500mm, so the 150mm nominal stroke is well within standard limits.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X150-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 40 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40mm screw adjustment lets technicians dial in the exact stroke end on a new assembly line without cutting brackets or re-machining stops, speeding up initial machine bring-up.
On a packaging line running multiple box sizes, the adjustable stroke allows a quick end-stop change between formats, reducing downtime compared to swapping fixed-stroke cylinders.
In a high-cycle clamping application, the screw can be advanced slightly over time to take up mechanical wear in tooling, maintaining consistent clamp force without replacing parts.
Choose the SCJ80X150-40 when you need a 150mm nominal stroke that can be shortened by up to 40mm at the rear screw, ideal for setting a precise end position on a press or clamping fixture. If your force requirement is lower, stepping down to the 63mm bore SCJ63 series (1559 N push at 0.5 MPa) reduces air consumption and physical size. For applications needing a fixed, non-adjustable stroke, the standard SC80X150 is a simpler, slightly shorter alternative.
For direct replacement, match an AirTAC SCJ adjustable-stroke cylinder of 80mm bore, 150mm nominal stroke, and 40mm adjust range with PT ports and basic mounting. If you later need position sensing, order the -S magnet version and add CMSG/DMSG sensors. For strokes of 300mm or more, evaluate side-loading on the 25mm rod and consider an external guide or a guided cylinder if the load is not perfectly axial.
Adjustable-stroke checklist
At 0.5 MPa air pressure, the 80mm bore produces 2513 N of push force and 2268 N of pull force (the difference is due to the 25mm rod area on the pull side). At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 5026 N.
Yes, if you need the adjustable stroke feature. The SCJ80X150-40 has the same bore, rod diameter, and port size as an SC80, but the body is slightly longer to house the adjusting screw. Ensure the 40mm adjustment range does not interfere with your machine envelope and that you match the port thread (PT) and mounting style.
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