The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X155-30 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, 155mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The AirTAC SCJ80X155-30 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides a 30mm adjustable range, letting you shorten the effective stroke without changing the cylinder body. With an 80mm bore and 25mm piston rod, it delivers a substantial 2513 N of push force at 0.5 MPa, making it a solid choice for medium-to-heavy material handling and positioning tasks.
This cylinder is part of the tie-rod SCJ family and uses PT3/8 ports with an M20x1.5 rod thread. The integrated air cushion, with a 21mm length, decelerates the piston smoothly near the end of travel. The body length for this adjustable-stroke design is 239 mm, and it operates reliably within a standard pressure range of 0.15 to 1.0 MPa.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X155-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 155 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. |
| ×155 | 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.
The 30mm adjustment range allows operators to fine-tune the gate retraction distance for different box sizes on a conveyor line without swapping the cylinder or adding external hard stops.
In a CNC fixture, the adjustable stroke lets you set the exact clamp engagement depth for a new workpiece batch, preventing part deformation while using the full 2513 N clamping force.
For a bearing insertion station, the rear screw can be adjusted to precisely limit the press stroke end, ensuring consistent insertion depth as tooling wears over thousands of cycles.
Select the SCJ80X155-30 when your application requires a robust 80mm bore actuator with the ability to dial in the stroke end during commissioning or changeovers. If 2513 N of push force at 0.5 MPa is insufficient, stepping up to the 100mm bore SCJ100 series provides 3927 N. For a simpler, fixed-stroke solution without the adjusting screw, the standard SC80 series is a direct alternative. This model is a direct replacement for any AirTAC SCJ adjustable-stroke cylinder of the same 80mm bore, 155mm nominal stroke, and 30mm adjustment range, with PT ports and basic mounting.
Adjustable-stroke checklist
Being a single-rod cylinder, push and pull forces differ. At 0.5 MPa, 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.
No, the SCJ80X155-30 is not designed for position holding. If air pressure is lost or the valve centers, the piston will drift. The adjusting screw only sets the stroke end position and the air cushion only decelerates the piston; neither acts as a mechanical lock. You must use an external rod brake or pilot-operated check valve for load holding.
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