The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X60-20S 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, 60mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X60-20S is a double-acting, single-rod pneumatic cylinder from AirTAC, engineered with a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke-end control. This allows fine-tuning of the piston stop position without replacing the cylinder or adding external hard stops, making it ideal for commissioning and format changeovers. Its 80 mm bore delivers a substantial 2513 N of push force at 0.5 MPa, driven by a 25 mm diameter piston rod.
This model features a built-in magnet (denoted by the -S suffix), allowing direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the barrel for precise end-of-stroke or mid-stroke position feedback. The cylinder body has a length of 239 mm (A dimension) and uses PT3/8 ports. Operating on filtered air from 0.15 to 1.0 MPa, it includes an adjustable air cushion to decelerate the piston smoothly near the end of its travel.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X60-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 60 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. |
| ×60 | 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.
The 20mm stroke-end adjustment lets technicians dial in the exact stopping position during initial machine commissioning, eliminating the need to shim or reposition the cylinder to achieve precise alignment with tooling.
In high-cycle pick-and-place or clamping operations, the adjustable screw can be used to gradually extend the stroke to compensate for wear on gripper pads or contact surfaces, maintaining consistent clamping force without immediate part replacement.
For packaging or assembly lines that process multiple product sizes, the adjustable stroke allows a single actuator to be quickly reconfigured for different stopping positions, reducing changeover time and the inventory of dedicated-stroke cylinders.
Select the SCJ80 bore when your application requires a push force around 2513 N at standard plant pressure. If you need a more compact solution and can accept a lower force, stepping down to the SCJ63 bore provides 1559 N of push force. For applications demanding over 3900 N, the SCJ100 bore is the natural step up. This adjustable-stroke model is the right choice when the final stroke length needs to be dialed in on the machine; if your stroke is fixed and non-adjustable, the standard SC series is a more cost-effective alternative.
For a direct replacement, match an AirTAC SCJ cylinder with an 80 mm bore, a 60 mm nominal stroke, a 20 mm adjustment range, PT3/8 ports, and a built-in magnet. This model uses a basic mounting configuration, so it requires a separate mounting bracket from the SCJ subset, such as the FA front flange (F-SC80FA) or LB foot mount (F-SC80LB).
Adjustable-stroke checklist
The force depends on the operating pressure. At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (reduced due to the 25 mm rod area). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N. Always design your circuit using the pull force value for retraction.
Yes. The 'S' suffix in the model code SCJ80X60-20S confirms a built-in magnet is installed on the piston. This allows you to clamp AirTAC CMSG, DMSG, or EMSG series sensors directly onto the cylinder barrel's tie-rod slots to provide a reliable electrical signal at a specific piston location.
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