The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X225-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø80mm bore, 225mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X225-100S is an 80 mm bore, double-acting, single-rod pneumatic cylinder engineered for applications where the end-of-stroke position must be fine-tuned on the machine. Its rear-cap adjusting screw provides a full 100 mm of adjustment range, letting you dial in the exact stroke length needed without replacing the cylinder or adding external hard stops. With a 25 mm diameter piston rod and PT3/8 ports, it delivers a substantial 2513 N of push force at 0.5 MPa.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for reliable, non-contact position feedback. The standard TPU seals offer a wide operating temperature range of -20 to +70 °C, and the 28 mm air cushion at each end decelerates the piston smoothly, protecting the end caps during high-cycle operation. The body length A(SCJ) for this bore is 239 mm.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X225-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 100 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. |
| -100 | 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.
Field technicians can adjust the 100mm stroke-end screw to precisely set the stopping position of a pusher or stop gate during initial machine commissioning, eliminating the need for shims or custom-length cylinders.
On a packaging line, the adjustable stroke allows operators to quickly change the cylinder's end position to accommodate different box or product sizes without mechanical modifications, significantly reducing downtime.
In clamping or pressing applications, the adjusting screw can be used to take up mechanical wear in tooling or workpieces over time, maintaining consistent clamp force and position without replacing the actuator.
Choose this 80 mm bore when your application needs more force than the 1559 N (push at 0.5 MPa) offered by the 63 mm bore, but does not require the heavy 3927 N output of the 100 mm size. The 100 mm adjustment range makes this cylinder ideal for commissioning and format changeovers where the exact stopping position is determined empirically. If your stroke length is fixed and will never need field adjustment, a standard SC80X225 cylinder is a simpler, cost-effective alternative.
For a direct replacement, match the 80 mm bore, 225 mm nominal stroke, and the full 100 mm adjustment range (-100). This unit uses the PT port thread and the built-in magnet for sensor mounting. At this 225 mm stroke, the rod is well-supported within the cylinder, but if your load creates a significant side force, consider adding an external linear guide or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the theoretical 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 0.9 MPa, the push force reaches 4523 N.
Yes, you can replace it if you need the field-adjustable stroke feature. The SCJ80X225-100S has the same 80 mm bore and 225 mm nominal stroke but adds a rear adjusting screw with a 100 mm range. Ensure your mounting and port connections (PT3/8) are compatible, and note that the SCJ body is slightly longer to house the adjustment mechanism.
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