The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X50-40 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, 50mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X50-40 is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a 50 mm nominal stroke and a 40 mm rear adjusting screw range. This design lets you fine-tune the stroke end position on the machine, providing 2513 N of push force at 0.5 MPa. The 25 mm diameter piston rod and PT3/8 ports handle demanding linear tasks, while the 28 mm air cushion decelerates the piston smoothly at each end of travel.
Built on a robust tie-rod platform with a body length A of 239 mm, this cylinder is a practical choice for applications where the exact stop position must be dialled in during commissioning or changeovers. The adjustable stroke feature is purely mechanical, shortening the stroke end by up to 40 mm without affecting the cylinder's force output or speed capabilities.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X50-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 50 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. |
| ×50 | 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.
Dial in the perfect actuator stop position during machine commissioning. The 40 mm adjustment range allows engineers to compensate for assembly tolerances and fine-tune the stroke end without re-machining brackets or swapping cylinders.
Quickly adapt a stopper or pusher station for different product sizes on a packaging line. The rear screw adjustment lets operators change the stroke end in seconds, minimizing downtime between production runs.
Compensate for mechanical wear in tooling or gripper fingers over time. The adjustable stroke end can be periodically tweaked to maintain precise part contact, extending the service life of the entire assembly.
Choose the SCJ80X50-40 when you need to precisely set a stroke end stop within a 40 mm window without adding external hard stops. If your force requirement is lower, the 63 mm bore SCJ series provides 1559 N of push force at 0.5 MPa. For applications needing a fixed, non-adjustable stroke, the standard SC80X50 is a direct alternative. This model is a drop-in replacement for an existing AirTAC SCJ80X50-40 with basic mounting, TPU seals, and PT ports; ensure the adjust range, port thread, and any magnet or mounting accessories match your current setup.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, the cylinder delivers 2513 N of push force and 2268 N of pull force. The push force is higher because the single piston rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 513 kgf.
You can replace it if you specifically need the adjustable stroke feature. The SCJ80X50-40 has a longer body to house the adjusting screw and offers a 40 mm stroke-end adjustment range. If you do not need adjustability, the fixed-stroke SC80X50 is a direct dimensional match. Ensure the port thread (PT), mounting style, and any magnet option match your existing setup.
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