The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X50-50SH 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, 50mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X50-50SH is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap screw provides up to 50 mm of adjustment, allowing the effective stroke to be fine-tuned from the nominal 50 mm down to 0 mm without replacing the cylinder. This model is configured with a built-in magnet for sensor mounting and high-temperature Viton seals, delivering a push force of 2513 N at 0.5 MPa.
Built on the robust SC tie-rod platform, the cylinder features a 25 mm diameter piston rod and PT3/8 ports. The adjustable air cushion, with a 28 mm cushion length, decelerates the piston smoothly at the end of travel. This specific variant is suited for environments up to 150°C, making it a direct fit for applications where standard polyurethane seals would degrade.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X50-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 50 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. |
| ×50 | 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.
In ovens or autoclaves, the 50 mm adjustment screw allows operators to dial in the precise stop position for a pusher arm without opening the hot chamber, while the Viton seals reliably withstand continuous 150°C exposure.
Adjust the stroke end to fine-tune the stopping point of a staging gate on a heated conveyor. The built-in magnet enables closed-loop position confirmation via CMSG sensors, even in aggressive thermal environments.
Quickly adapt the stroke of a clamping or ejector cylinder during product changeovers on a thermoforming line. The 50 mm range handles significant tooling stack-up variations without swapping the actuator.
Choose the SCJ80 series for applications needing up to 2513 N of push force at standard plant air pressure. If your force requirement is lower, stepping down to the 63 mm bore provides 1559 N of push force at 0.5 MPa. For applications that do not need field-adjustable stroke, a fixed-stroke SC80 cylinder is a simpler, more cost-effective alternative. This SCJ80X50-50SH is a direct replacement for any AirTAC SCJ cylinder of the same 80 mm bore, 50 mm nominal stroke, and 50 mm adjustment range, provided it also uses the PT port thread, basic mounting, magnet, and Viton seal configuration.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder provides 2513 N of push force and 2268 N of pull force. The maximum push force at the 1.0 MPa operating limit is 4523 N. The pull force is lower due to the area of the 25 mm piston rod.
No. The SCJ is a standard double-acting cylinder and will not hold its position if air pressure is removed or the directional valve is centered. The adjustable screw only sets the stroke end position and does not act as a mechanical lock. For load holding without pressure, you must add an external rod brake or a pilot-operated check valve.
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