The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X90-40 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, 90mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X90-40 is an 80 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 40 mm of field-adjustable stroke reduction. At 0.5 MPa, it delivers 2513 N of push force and 2268 N of pull force, making it suitable for medium-heavy clamping, pressing, and positioning tasks where the end stop requires fine-tuning during commissioning or format changes.
This tie-rod cylinder uses a 25 mm diameter piston rod, PT3/8 ports, and an M20x1.5 rod thread for robust connection. The adjustable air cushion is 28 mm long, and the SCJ body length A is 239 mm. The operating pressure range is 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa, and the standard speed range for this bore is 30-800 mm/s.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X90-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 90 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. |
| ×90 | 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.
Fine-tune the stroke end position during machine commissioning to account for assembly tolerances without needing to modify tooling or add external hard stops.
Quickly adjust the actuator stroke for different product sizes on a packaging or sorting line, reducing downtime between batches.
Compensate for mechanical wear in grippers or pressing tools over time by incrementally adjusting the cylinder's end stop, extending the service life of the tooling.
Choose the SCJ80X90-40 when you need to dial in a precise stroke end position on the machine without swapping cylinders. If the 2513 N push force at 0.5 MPa is slightly low, stepping up to the 100 mm bore provides 3927 N. For a simpler, fixed-stroke application where adjustability is not required, the standard SC80X90 is a direct alternative. A direct replacement must match the 80 mm bore, 90 mm nominal stroke, 40 mm adjust range, PT3/8 ports, and basic mounting. Since the nominal stroke is under 300 mm, side-load concerns are minimal, but always align the rod axially with the load.
Adjustable-stroke checklist
The theoretical push force at 0.5 MPa is 2513 N, and the pull force is 2268 N (due to the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N. Always apply a safety factor for real-world dynamic loads.
Yes, it is a direct dimensional replacement if the body length increase for the adjusting screw is acceptable. The SCJ80X90-40 provides the same 80 mm bore and 90 mm maximum stroke but adds a 40 mm adjustable range, allowing you to shorten the stroke end without changing the cylinder.
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