The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X700-50S 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, 700mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X700-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 50 mm of stroke reduction, letting you fine-tune the 700 mm nominal stroke for precise end-position setup without swapping the cylinder. At 0.5 MPa, it delivers 2513 N of push force and 2268 N on the pull stroke, driven by a 25 mm diameter piston rod.
This 80 mm bore model uses PT3/8 ports and incorporates a built-in magnet, enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors for piston position feedback. The cylinder body length A(SCJ) is 239 mm, and the standard TPU seals provide reliable operation from -20 to +70 °C. It is a genuine AirTAC tie-rod cylinder, ideal for applications where the stroke end must be dialed in during commissioning or changeovers.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X700-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 700 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. |
| ×700 | 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 screw allows operators to quickly dial in the exact stop position for pressing, clamping, or ejecting parts on a moving line, compensating for part tolerance variations without stopping production.
When a packaging machine switches between box sizes, the SCJ80X700-50S can be adjusted to change the stroke end for different case erectors or palletizing arms, eliminating the need for mechanical stop changes.
In long-stroke pusher or lift systems, the adjustable stroke can be extended over time to compensate for wear on gripper pads or mechanical linkages, maintaining consistent engagement without replacing the actuator.
Choose the SCJ80X700-50S when your application requires a powerful push force of 2513 N at standard line pressure and the ability to fine-tune the stroke end by up to 50 mm. If your force requirement is lower, stepping down to a 63 mm bore reduces push force to 1559 N at 0.5 MPa. For higher force needs, the 100 mm bore provides 3927 N. If you do not need stroke adjustability, the fixed-stroke SC80 series offers a simpler, more compact alternative.
For this 700 mm stroke length, carefully manage side loads to prevent rod bending. An external guide rail or a switch to a guided cylinder is recommended if the load is not perfectly axial. As a direct replacement, match this model with another AirTAC SCJ cylinder of 80 mm bore, 700 mm nominal stroke, a 50 mm adjustment range, PT ports, and the -S magnet option. This model uses a basic mount; foot (LB), front flange (FA), or center trunnion (TC) mounting accessories are available separately.
Adjustable-stroke checklist
The theoretical push force is 2513 N at 0.5 MPa and 4523 N at the maximum operating pressure of 0.9 MPa. The pull force is slightly lower at 2268 N at 0.5 MPa due to the area of the 25 mm piston rod. These forces are identical to the fixed-stroke SC80 cylinder.
Yes, this is a direct dimensional and performance replacement for any AirTAC SCJ80X700-50 cylinder. Ensure your replacement matches the 80 mm bore, 700 mm nominal stroke, 50 mm adjustment range, PT port thread, and the -S magnet option for sensor compatibility.
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