The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X150-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 150mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X150-20S is an 80 mm bore, double-acting, single-rod pneumatic cylinder that puts 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa into a compact tie-rod body. Its defining feature is the rear-cap adjusting screw, which lets you shorten the stroke end by up to 20 mm on the machine—no cylinder swap, no external hard stops. The built-in magnet (S suffix) allows CMSG/DMSG/EMSG sensors to clamp directly onto the barrel for clean, contactless end-of-stroke sensing.
With a 25 mm piston rod, PT3/8 ports, and a 28 mm air cushion, this SCJ80 variant handles rapid cycling up to 800 mm/s while decelerating the load smoothly at stroke end. The body length A is 239 mm, and the standard stroke range for this bore extends to 1500 mm. It is a genuine AirTAC adjustable-stroke cylinder, ready to fine-tune your machine's motion without re-plumbing.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X150-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 20 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. |
| -20 | 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 bring-up, the 20 mm adjusting screw lets technicians dial in the exact stroke end position without swapping cylinders or machining spacer blocks, cutting setup time on packaging and assembly lines.
On a multi-format conveyor diverter, operators can quickly re-set the pusher stroke for different box widths. The built-in magnet provides sensor feedback to the PLC, confirming each stroke completes correctly.
In clamping or pressing fixtures, the adjustable stroke end compensates for tooling wear or material thickness variation over time, maintaining consistent clamp force without reprogramming the machine controller.
Choose the SCJ80X150-20S when your application needs a field-tunable stroke end within a 20 mm window—ideal for commissioning, format changeovers, or taking up mechanical wear. If you need more force, stepping up to the 100 mm bore delivers 3927 N push at 0.5 MPa; if space is tight, the 63 mm bore still provides 1559 N. For a fixed, non-adjustable stroke, the standard SC80 series is a simpler, lower-cost alternative. This model is a direct replacement for any AirTAC SCJ80 cylinder with a 150 mm nominal stroke, 20 mm adjust range, PT ports, basic mounting, and a magnet sensor. For strokes of 300 mm or more, evaluate side-loading and rod deflection—an external guide or a guided cylinder will protect the rod bearing and seal from premature wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (the difference is due to the single 25 mm rod). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N. Always size the cylinder based on your available air pressure and the required safety factor.
Yes, if your existing cylinder is an AirTAC SCJ80 with a 150 mm nominal stroke, a 20 mm adjustable range, PT ports, basic mounting, and a magnet sensor. The SCJ series is a direct dimensional match for itself. If you need a fixed stroke, the SC80 series is the correct alternative.
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