The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X120-50S 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, 120mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X120-50S is a double-acting, single-rod pneumatic cylinder that delivers 2513 N of push force at 0.5 MPa, making it a robust actuator for medium-duty automation. Its defining feature is a rear-cap adjusting screw that provides up to 50 mm of stroke-end adjustment, allowing you to fine-tune the piston's stopping position on the fly without swapping the cylinder or adding external hard stops.
This model includes a built-in magnet (S suffix) for direct mounting of CMSG/DMSG/EMSG sensors, enabling precise, non-contact end-of-stroke detection. With a 25 mm diameter piston rod, PT3/8 ports, and a 28 mm air cushion, the SCJ80X120-50S is engineered for reliable, high-cycle performance in a compact tie-rod body.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X120-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 120 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. |
| ×120 | 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 is ideal for dialing in the exact stroke during machine commissioning, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error setup.
In high-cycle clamping or pressing operations, the adjustable stroke can be periodically tweaked to compensate for gripper pad or tooling wear, maintaining consistent process force without immediate part replacement.
Perfect for packaging or assembly lines that run multiple product sizes. Operators can quickly adjust the cylinder's end-stop to accommodate a new box height or component thickness, slashing changeover time.
Select the SCJ80X120-50S when your application requires a 120 mm nominal stroke with the flexibility to shorten it by up to 50 mm during setup or changeovers. If your force requirements are lower, stepping down to a 63 mm bore reduces push force to 1559 N at 0.5 MPa, which can save energy and space. For a fixed, non-adjustable stroke, the standard SC series is a more economical choice. A direct replacement must match the 80 mm bore, 120 mm nominal stroke, 50 mm adjustment range, PT3/8 ports, and the integrated magnet.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this cylinder generates 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 due to the area of the 25 mm piston rod.
A screw in the rear cap limits the piston's retraction, allowing you to shorten the nominal 120 mm stroke by up to 50 mm. This is a mechanical end-stop adjustment, not a locking device. The cylinder will not hold a load if air pressure is lost; an external rod brake or pilot-operated check valve is required for load holding.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.