The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X125-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø80mm bore, 125mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X125-10S is an 80 mm bore double-acting single-rod cylinder with a 125 mm nominal stroke and a 10 mm rear-end adjustable stroke range, giving you fine control over the piston stop position without swapping hardware. It delivers 2513 N push and 2268 N pull at 0.5 MPa, with a 25 mm rod and PT3/8 ports, making it a robust choice for tasks needing mid-range force and on-machine stroke tuning.
Its built-in magnet (-S suffix) lets you mount CMSG/DMSG/EMSG reed or solid-state sensors directly on the tie-rod barrel for reliable end-of-stroke detection. The body length A(SCJ) is 239 mm, and the adjustable air cushion decelerates the piston smoothly. This unit comes with TPU seals and PT threads, ready for filtered-air operation from 0.15 to 1.0 MPa.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X125-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 125 mm |
| Stroke adjustment | Up to 10 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. |
| ×125 | Nominal (maximum) stroke length in mm. |
| -10 | 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 setup, the 10 mm adjusting screw lets technicians dial in the exact stroke end for grippers or pushers without iterative cylinder swaps, speeding up line commissioning.
On packaging lines, mechanical end-stops wear over time. The SCJ's rear screw compensates for this wear, restoring the precise stopping position of a diverter gate without replacing the cylinder.
When a machine switches between product sizes, the adjustable stroke allows operators to quickly reset the cylinder's end position for different case sizes, reducing downtime during batch changes.
Step up to the SCJ100 series if your application needs more push force—the 100 mm bore provides 3927 N at 0.5 MPa. If your stroke is fixed and you don't need field adjustability, a standard SC80 fixed-stroke cylinder is a simpler, cost-effective alternative. For a direct replacement, match the 80 mm bore, 125 mm nominal stroke, 10 mm adjust range, PT ports, and built-in magnet.
At 125 mm stroke, side-loading is generally manageable, but always align the rod with the load axis. If the application introduces any lateral force, consider adding an external guide rail or switching to a guided cylinder to protect the rod bearing and seals from premature wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
Yes, provided the mounting and porting match. The SCJ80X125-10S is a direct dimensional replacement for another AirTAC SCJ80X125-10S. If you are upgrading from a fixed-stroke SC80, ensure the 10 mm adjustable range and the slightly longer body length A(SCJ) of 239 mm fit your machine envelope.
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