The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X55-50S 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, 55mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X55-50S is an 80 mm bore double-acting, single-rod cylinder with a rear-cap adjusting screw that provides up to 50 mm of field-adjustable stroke-end reduction. This allows you to fine-tune the piston’s end position without swapping the cylinder, making it ideal for commissioning trials and format changeovers. The built-in magnet (suffix -S) lets you clamp CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for reliable, non-contact position feedback.
At 0.5 MPa air pressure, this cylinder delivers 2513 N of push force and 2268 N of pull force, with a maximum operating thrust of 4523 N at 0.9 MPa. The 25 mm diameter piston rod provides robust guidance, while the 28 mm long adjustable air cushion at each end decelerates the load smoothly. The body length A(SCJ) is 239 mm, and the G1/4 port threads are standard PT type.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X55-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 55 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. |
| ×55 | 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.
The 50 mm adjustment range lets technicians dial in the exact stroke end position during initial machine setup without needing to swap out cylinders or fabricate custom mechanical stops.
Quickly adapt a pusher or stopper station on a conveyor line to handle different box or pallet sizes by adjusting the cylinder's stroke end, reducing downtime between production runs.
In high-cycle clamping or pressing applications, the adjustable screw can be used to take up mechanical wear in tooling or fixtures over time, maintaining consistent clamping force and position.
Choose the SCJ80X55-50S when you need a powerful, mid-range actuator with the flexibility to fine-tune the stroke end on the machine. For a step up in force, the 100 mm bore SCJ offers 3927 N of push force at 0.5 MPa; for a more compact solution, the 63 mm bore provides 1559 N. If your application does not require stroke adjustment, a fixed-stroke SC80 cylinder is a simpler, direct alternative. This SCJ model is a direct replacement for another AirTAC SCJ80 pneumatic cylinder with a 55 mm nominal stroke, a 50 mm adjustable range, PT ports, a basic mount, and a magnet.
For this 55 mm stroke, side-loading is typically minimal, but if the rod is subjected to any off-axis forces, consider pairing the cylinder with an external linear guide or selecting a guided cylinder to prevent premature rod bearing and seal wear.
Adjustable-stroke checklist
A threaded screw in the rear cap acts as an internal, adjustable end stop for the piston. By turning the screw, you can shorten the stroke end by up to 50 mm from the nominal 55 mm maximum. It only adjusts the stroke end position and does not change the cylinder's force or speed.
The push force is based on the full 80 mm bore area, while the pull force is reduced by the 25 mm rod area. At the standard operating pressure of 0.7 MPa, it generates 3518 N of push force and 3168 N of pull force. The maximum push force at 1.0 MPa is 5026 N.
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