The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X175-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø80mm bore, 175mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X175-40 is an 80 mm bore double-acting single-rod cylinder with a 175 mm nominal stroke and a 40 mm rear adjustable range. At the standard 0.5 MPa operating pressure, it delivers 2513 N of push force and 2268 N on the pull stroke, driven by a 25 mm diameter piston rod. The rear-cap adjusting screw lets you shorten the stroke end by up to 40 mm without removing the cylinder, making it ideal for commissioning fine-tuning and format changeovers.
This tie-rod cylinder uses PT3/8 ports and an M20x1.5 rod thread, with a 28 mm air cushion at each end for smooth deceleration. The SCJ body length A is 239 mm, slightly longer than a fixed-stroke SC of the same bore. Operating pressure spans 0.15–1.0 MPa, and the standard speed range is 30–800 mm/s. At the maximum 0.9 MPa operating pressure, push thrust reaches 4523 N.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X175-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 40 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. |
| -40 | 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.
Dial in the exact stroke end position during machine commissioning. The 40 mm rear screw adjustment allows engineers to fine-tune the actuator throw on the fly without dismantling linkages or fabricating custom stops.
Quickly adapt to different product sizes on packaging or sorting lines. Operators can adjust the cylinder stroke end to match new box heights or pallet dimensions, reducing downtime between production runs.
Take up mechanical play or seal wear over time in clamping and pressing fixtures. The adjustable stroke end screw lets maintenance teams restore precise end-position accuracy without replacing the entire cylinder.
Choose the SCJ80X175-40 when you need to fine-tune the stroke end position on the machine without swapping cylinders or adding external hard stops. If your application requires more force, stepping up to the 100 mm bore SCJ delivers 3927 N push at 0.5 MPa; for a lighter, more compact solution, the 63 mm bore provides 1559 N push. For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder of 80 mm bore, 175 mm nominal stroke, 40 mm adjust range, PT3/8 ports, and basic mounting.
At a 175 mm stroke, side-loading is generally manageable, but if the rod is subjected to off-axis forces or the stroke is extended further, consider an external guide rail or a guided cylinder to protect the rod bearing and seal from premature wear. If you do not need field-adjustable stroke, the fixed-stroke SC80X175 is a simpler, cost-effective alternative.
Adjustable-stroke checklist
At 0.5 MPa air pressure, the push force is 2513 N and the pull force is 2268 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N.
Yes, if your existing cylinder is an AirTAC SCJ80 with a 175 mm nominal stroke, 40 mm adjust range, PT3/8 ports, and basic mounting. The SCJ is a tie-rod cylinder, not an ISO 15552 profile cylinder, so dimensional interchangeability is limited to other AirTAC SCJ units of the same configuration.
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