The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X300-75S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø80mm bore, 300mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X300-75S is an 80 mm bore double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap screw provides up to 75 mm of stroke shortening, letting you fine-tune the end position for commissioning or format changes 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 model includes a built-in magnet, enabling direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for reliable end-of-stroke detection. The body length is 239 mm, and it uses a PT3/8 port with an M20x1.5 rod thread. The adjustable air cushion decelerates the piston smoothly, with a 28 mm cushion length.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X300-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 75 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. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
Fine-tune the actuator end-stop on a new packaging machine during initial run-off, dialing in the precise push distance for different box sizes without mechanical rework.
Adjust the stroke end on a conveyor diverter gate to take up mechanical play or seal wear over time, maintaining consistent part positioning without replacing the cylinder.
Quickly reset the stroke on a clamping or pressing station when switching between product variants, reducing changeover time on a high-mix production line.
Choose the SCJ80X300-75S when you need to dial in a precise stroke end position within a 75 mm window. For higher force, step up to the 100 mm bore which provides 3927 N of push at the same pressure; for a lighter, more compact solution, the 63 mm bore offers 1559 N. If your application requires a fixed, non-adjustable stroke, the standard SC80X300 is a direct alternative. For strokes of 300 mm or more, manage side-loading by pairing the cylinder with an external guide rail or switching to a guided cylinder assembly to prevent rod bending. A direct replacement must match the 80 mm bore, 300 mm nominal stroke, 75 mm adjust range, PT3/8 port, and built-in magnet.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. The maximum push force at 0.9 MPa is 4523 N.
Yes, if you need an adjustable stroke end. The SCJ80X300-75S matches the mounting footprint of an SC80 but adds a rear adjusting screw. Ensure the 75 mm adjustment range and the built-in magnet sensor option are compatible with your machine's control setup.
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