The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X80-20S 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, 80mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X80-20S is an 80 mm bore double-acting, single-rod cylinder with a field-adjustable stroke end, capable of 2513 N of push force at 0.5 MPa. The rear-cap adjusting screw provides up to 20 mm of stroke-end reduction, allowing precise fine-tuning on the machine without swapping the cylinder. Its 25 mm piston rod and PT3/8 ports are standard for this bore class.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable end-of-stroke detection. The body length A is 239 mm, and it features an adjustable air cushion for smooth deceleration. Operating pressure is 0.15-1.0 MPa with a standard TPU seal for -20 to +70 C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X80-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 80 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. |
| ×80 | 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 20 mm stroke-end adjustment lets technicians dial in the exact stop position during initial machine setup without mechanical rework, saving hours of downtime.
On packaging lines, quickly adjust the cylinder stroke to accommodate different box sizes or product formats, eliminating the need for multiple fixed-stroke cylinders.
In clamping or pressing applications, the screw can be advanced to take up mechanical wear on tooling or contact surfaces, maintaining consistent process force over time.
Choose the SCJ80 when you need to commission or adjust the stroke end position on the fly, and the 2513 N push force at 0.5 MPa fits your load. If you require more force, stepping up to the 100 mm bore provides 3927 N of push at the same pressure. For a purely fixed-stroke application, a standard SC80 cylinder is a simpler, cost-effective alternative.
This SCJ80X80-20S is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder with an 80 mm bore, 80 mm nominal stroke, 20 mm adjust range, PT ports, and a built-in magnet. For strokes of 300 mm or more, evaluate the rod for side loading and consider an external guide or a guided cylinder to prevent bending.
Adjustable-stroke checklist
At 0.5 MPa, it delivers 2513 N of push force and 2268 N of pull force. The push force is higher because it is a single-rod cylinder. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 513 kgf.
Yes, this is a direct replacement for an AirTAC SCJ80 with an 80 mm nominal stroke and a 20 mm adjust range. Ensure your existing mounting is compatible (basic, FA, LB, or TC) and that the port thread is PT. The built-in magnet also requires matching sensors.
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