The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X175-75S 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, 175mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X175-75S is a double-acting, single-rod pneumatic cylinder that delivers 2513 N of push force at 0.5 MPa, making it a capable actuator for medium-duty industrial tasks. Its defining feature is a rear-cap adjusting screw that provides a 75 mm field-adjustable stroke range, allowing machine builders to fine-tune the end position without replacing the cylinder or adding external hard stops.
This model includes a built-in magnet (suffix -S), enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. With a 25 mm piston rod, PT3/8 ports, and a 28 mm air cushion, the cylinder body length (A dimension) is 239 mm, offering a compact footprint for its 175 mm nominal stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X175-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 175 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. |
| ×175 | 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.
Adjust the pusher stroke end by up to 75 mm on the fly to handle different box sizes on a single packaging line without mechanical changeover parts.
Dial in the exact clamp position for a family of workpieces on a CNC fixture, using the sensor magnet to confirm the part is secured before machining starts.
Fine-tune the actuator's end stop during initial machine setup or compensate for gripper pad wear over time, maintaining consistent pick-and-place accuracy.
Select the SCJ80 when your application needs roughly 2500 N of push force at standard shop air; if you need more, the SCJ100 provides 3927 N at the same pressure, while the SCJ63 offers a lighter 1559 N for smaller fixtures. This adjustable-stroke model is the right choice over a fixed-stroke SC when you anticipate needing to dial in the stroke end during commissioning, accommodate tooling wear, or handle multiple product formats on the same machine. For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with an 80 mm bore, 175 mm nominal stroke, a 75 mm adjustment range, PT ports, a basic mount, and a built-in magnet. At this 175 mm stroke, the piston rod is well-supported, but for strokes exceeding 300 mm, consider an external guide rail or a guided cylinder to manage side loads and prevent rod bending.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The force increases linearly with pressure, reaching 4523 N of push force at the maximum operating pressure of 0.9 MPa. Because it is a single-rod cylinder, the push force is always greater than the pull force.
Yes, if you need the ability to shorten the stroke end by up to 75 mm. The SCJ80 shares the same bore, port size (PT3/8), and mounting accessories as the SC80. Ensure the longer rear cap with the adjusting screw fits your machine envelope and that you order the -S magnet option if your existing setup uses sensors.
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