The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X225-30S 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, 225mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X225-30S is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. This lets you fine-tune the 225 mm nominal stroke during commissioning or format changes without replacing the cylinder. At 0.5 MPa, it delivers 2513 N of push force and 2268 N of pull force, suiting medium-duty positioning tasks.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The 80 mm bore features a 25 mm diameter piston rod, PT3/8 ports, and a 28 mm air cushion for smooth deceleration. The body length A(SCJ) is 239 mm plus stroke, making it a compact solution for machinery where the final stop position needs on-machine adjustment.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X225-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 225 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. |
| ×225 | 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.
During machine bring-up, the 30 mm adjusting screw allows engineers to dial in the exact stroke end position for grippers or pushers without iterative disassembly, speeding up factory acceptance testing.
On packaging lines, operators can quickly adjust the stop position for different box sizes by turning the rear screw, eliminating the need for mechanical hard stops and reducing changeover time.
In clamping or pressing fixtures, the adjustable stroke compensates for tooling wear or material thickness variations over time, maintaining consistent contact force without reprogramming the PLC.
Choose the SCJ80 bore when your application needs roughly 2513 N of push force at standard plant air pressure. If you require more force, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa. For lighter, more compact machines, the 63 mm bore delivers 1559 N. The SCJ adjustable-stroke design is the right pick over a fixed-stroke SC cylinder when the machine's end-stop position is not yet finalised or may need periodic tweaking for wear take-up.
To replace an existing SCJ80X225-30S, match the 80 mm bore, 225 mm nominal stroke, 30 mm adjust range, PT port thread, and the built-in magnet. This cylinder uses the basic mounting style; if you need to add a pivot or foot mount later, use the F-SC80TC or F-SC80LB accessory kits. For strokes of this length, ensure the rod is guided externally if significant side loads are present, or consider a guided cylinder to prevent rod bending.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The push force is higher because the single rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N.
No, the SCJ80X225-30S is not designed for mid-stroke position holding. If air pressure is lost or the directional valve is centered, the piston can drift. The rear adjusting screw only sets the physical stroke end. For load holding without live pressure, you must add an external rod lock or a pilot-operated check valve.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.