The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X180-75S 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. Ø80mm bore, 180mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X180-75S is an 80 mm bore double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly into the rear cap. A hardened adjusting screw lets you shorten the stroke end by up to 75 mm without removing the cylinder or adding external hard stops, making it ideal for commissioning trials and format changeovers. The built-in magnet (-S) allows CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection.
At 0.5 MPa air pressure this cylinder delivers 2513 N of push force and 2268 N on the pull stroke, with a 25 mm diameter piston rod and PT3/8 ports. The 28 mm air cushion decelerates the piston smoothly near the end of travel. With a body length of 239 mm (A dimension) and a maximum standard stroke of 1500 mm, it provides a robust platform for medium-to-heavy linear positioning tasks where the final stroke length needs to be dialed in precisely on the machine.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X180-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 180 mm |
| Stroke adjustment | Up to 75 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. |
| ×180 | 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 position of a material stop or clamp during machine commissioning. The 75 mm adjustment range lets technicians dial in the exact stroke without swapping cylinders or machining custom stops.
Adjust the stroke of a pusher or diverter on a packaging line when switching between product sizes. Operators can quickly set a new end position via the rear screw, minimizing downtime between production runs.
Compensate for tooling wear in pressing or crimping operations. As tool faces wear down, the stroke can be extended slightly to maintain consistent contact force and product quality without replacing the actuator.
Step up to a 100 mm bore SCJ if the 2513 N push force at 0.5 MPa is marginal—the SCJ100 delivers 3927 N from the same air pressure. For applications that do not require stroke adjustment, the fixed-stroke SC80 offers a simpler, slightly shorter body; if the load needs guidance against side forces, pair the cylinder with an external guide or switch to a guided cylinder series. When replacing, match the 80 mm bore, 180 mm nominal stroke, 75 mm adjustment range, PT3/8 ports, and the -S magnet option. For strokes of 300 mm and above on this bore, evaluate side-load and rod bending risks—an external guide rail or guided cylinder is recommended to protect the rod bearings and seal.
Adjustable-stroke checklist
At 0.7 MPa operating pressure, this 80 mm bore cylinder generates 3518 N of push force and approximately 3175 N of pull force. The push force is always higher than the pull force because the single rod reduces the effective piston area on the return stroke.
No. Like all standard pneumatic cylinders, the SCJ80X180-75S will drift or drop if air pressure is lost or the directional valve is centered. The rear adjusting screw only sets the stroke end position—it is not a mechanical lock. If the load must be held without live air pressure, you need to add a pilot-operated check valve or an external rod brake.
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