The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-50TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-50TC delivers up to 2513 N of push force at 0.5 MPa from an 80 mm bore, with a 25 mm piston rod providing robust linear motion. Its rear adjusting screw offers a 50 mm stroke-end reduction range, letting you fine-tune the retract position on the fly without swapping the cylinder or adding external hard stops.
This centre-trunnion-mounted variant (F-SC80TC with TCM1 bracket) suits pivoting applications, while the 28 mm air cushion at each end decelerates the 25 mm rod smoothly. The body length A(SCJ) is 239 mm, and the PT3/8 ports keep flow rates high for the 30-800 mm/s speed range.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-50TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 50 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. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
Packaging lines that switch between product sizes use the 50 mm adjust screw to quickly reposition the retract end stop, eliminating manual stop changes and reducing downtime during batch transitions.
The TC centre trunnion mount lets the cylinder swing freely as it actuates a diverter gate. The adjustable stroke fine-tunes the gate angle for reliable product sorting on conveyors.
In woodworking or welding fixtures, the 50 mm adjustment compensates for part thickness variation or jaw wear, maintaining consistent clamping force without replacing the cylinder.
Choose the SCJ80 when your load requires the 2513 N push force class of an 80 mm bore at standard plant air. If your force need is lower, the 63 mm bore provides 1559 N push, saving space and air consumption; for heavier loads, step up to the 100 mm bore at 3927 N push. The 50 mm adjustable stroke range makes this cylinder ideal for commissioning trials where the exact retract stop must be dialled in after installation.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with 80 mm bore, 75 mm nominal stroke, 50 mm adjust range, PT ports, and TC centre trunnion mounting. If your application does not need field adjustability, the fixed-stroke SC80X75 is a simpler alternative. At 75 mm stroke, rod bending from side load is unlikely, but always align the rod axis with the load path.
Adjustable-stroke checklist
At 0.5 MPa, the 80 mm bore generates 2513 N push and 2268 N pull (the pull force is lower due to the 25 mm rod area). At the maximum operating pressure of 1.0 MPa, theoretical push reaches 5026 N.
Yes, if you need the 50 mm stroke-end adjustability. The SCJ shares the same mounting footprint as the SC series, but the body length is slightly longer due to the rear adjusting screw mechanism. Ensure the 75 mm nominal stroke and TC trunnion mount match your machine layout.
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