The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X50-20TC 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, 50mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X50-20TC is an 80mm bore, double-acting, single-rod pneumatic cylinder that delivers 2513 N of push force at 0.5 MPa. Its defining feature is a rear-cap adjusting screw, giving you up to 20 mm of field-adjustable stroke-end control to dial in the exact stopping position without changing the cylinder. The 25 mm piston rod and PT3/8 ports handle demanding linear tasks.
This model comes configured with a TC centre trunnion mount (supplied with the TCM1 bracket), allowing the cylinder to pivot and absorb misalignment in swinging applications. The body length A(SCJ) is 239 mm, and the integrated air cushion decelerates the piston smoothly at the end of travel. It is a genuine AirTAC component built for reliable, repeatable motion.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X50-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 50 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. |
| ×50 | 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.
During machine commissioning, the 20 mm adjustment screw lets technicians quickly set the precise end-stop position for grippers or clamps without machining external hard stops.
The centre trunnion mount (TC) is ideal for pivoting diverter arms on conveyors. The adjustable stroke allows operators to fine-tune the gate angle for different product sizes after installation.
In pressing or clamping fixtures, the stroke can be adjusted over time to compensate for tooling or pad wear, maintaining consistent clamping force without reprogramming the PLC.
Choose the SCJ80X50-20TC when you need a mid-range force actuator with the flexibility to fine-tune the stroke end on the machine. If 2513 N of push force is insufficient, stepping up to the 100 mm bore provides 3927 N at the same pressure. For a fixed-stroke, non-adjustable solution, the standard SC80X50 is the direct alternative. This cylinder is a direct replacement for another AirTAC SCJ80 with a 50 mm nominal stroke, 20 mm adjust range, PT ports, and TC mount.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 80 mm bore cylinder produces 2513 N of push force and 2268 N of pull force. The maximum push force at 0.9 MPa is 4523 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the retract side.
It depends on your mounting and space constraints. The SCJ body length is longer than a fixed-stroke SC to accommodate the adjusting screw. If you have the space and need the 20 mm stroke adjustment, it is a functional upgrade. Ensure your mounting matches the TC centre trunnion style and PT3/8 port connections.
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