The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The AirTAC SCJ80X75-20S is a double-acting, single-rod tie-rod cylinder with a rear adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction. This allows you to fine-tune the piston's end position for commissioning, format changes, or wear compensation without removing the cylinder. With an 80 mm bore, it generates 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa, making it a robust choice for medium-to-heavy clamping and positioning tasks.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG sensors can be clamped directly to the barrel for reliable end-of-stroke or mid-stroke sensing. The cylinder uses a 25 mm diameter rod, PT3/8 ports, and an M20x1.5 rod thread. It features an adjustable air cushion (21 mm cushion length) for smooth deceleration and has a body length A of 239 mm. The standard TPU seal operates reliably from -20 to +70 °C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 20 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. |
| -20 | 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.
Fine-tune the end-of-stroke position during machine commissioning without needing shims or custom end stops. The 20 mm adjustment range allows installers to dial in the exact stopping point for a new tooling setup.
Quickly adapt a packaging machine's pusher stroke for a different box size. The rear adjusting screw lets operators shorten the 75 mm nominal stroke by up to 20 mm in seconds, minimizing downtime between production runs.
In high-cycle clamping fixtures, take up mechanical wear on contact surfaces by slightly extending the effective stroke. The SCJ80X75-20S's 2513 N push force at 0.5 MPa provides ample clamping power, while the screw maintains consistent clamp depth over time.
Choose the 80 mm bore when the 63 mm bore's 1559 N push force at 0.5 MPa is insufficient for your application. If your load requires less force, stepping down to the 63 mm bore can reduce air consumption and physical size. This SCJ model is ideal when you need to adjust the stroke end on the machine; if your stroke length is fixed and never needs field changes, the standard SC fixed-stroke cylinder is a simpler, cost-effective alternative. For a direct replacement, match the 80 mm bore, 75 mm nominal stroke, 20 mm adjust range, PT port thread, and the built-in magnet (-S). The basic mounting style accepts the FA front flange or LB foot bracket from the SCJ accessory subset.
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 increases to 4523 N. Because this is a single-rod cylinder, the pull force is lower due to the area of the 25 mm rod.
Only if you no longer need the adjustable stroke feature. The SCJ's rear adjusting screw adds length, so a fixed-stroke SC of the same bore and stroke will not be a drop-in dimensional match. For a direct replacement, you must use another SCJ80X75-20S cylinder to maintain the same mounting dimensions and the 20 mm stroke-end adjustment range.
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.