The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X80-75 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, 80mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X80-75 is an 80 mm bore double-acting single-rod cylinder with a rear adjusting screw that gives up to 75 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 2513 N push and 2268 N pull, making it a capable mid-range actuator for applications where the end-stop position needs regular fine-tuning without swapping the cylinder.
This model uses a 25 mm diameter piston rod, PT3/8 ports, and an M20x1.5 rod thread. The integral air cushion is 28 mm long, and the SCJ body length is 239 mm. Operating pressure spans 0.15–1.0 MPa, with a speed range of 30–800 mm/s. The standard TPU seal suits ambient temperatures from -20 to +70 °C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X80-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 80 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. |
| ×80 | 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.
In packaging or converting machinery, the 75 mm screw adjustment lets operators dial in a new product length stop quickly during batch changeovers, avoiding mechanical stop rework.
Machine builders use the wide adjust range to empirically find the optimal stroke end during commissioning trials, then lock the screw without needing to order a custom-stroke cylinder.
On a material pusher station where a rubber pad wears over time, the stroke-end screw can be gradually extended to compensate for pad thickness loss, maintaining consistent part placement.
Choose this 80 mm bore when the 63 mm bore's 1559 N push at 0.5 MPa is marginal but a 100 mm bore (3927 N push) would be oversized. The 75 mm adjustment range is ideal for applications needing a wide window of stroke-end tuning, such as format changeovers. If your stroke is fixed and never needs adjustment, the standard SC80X80 is a simpler alternative.
For replacement, match the 80 mm bore, 80 mm nominal stroke, 75 mm adjust range, PT3/8 ports, and basic mounting. This SCJ uses the standard tie-rod body; if the load creates a bending moment, especially at full extension, add an external guide rail or switch to a guided cylinder to protect the rod bearing.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder produces 2513 N on the push stroke and 2268 N on the pull stroke (the difference is due to the 25 mm rod area). The maximum push force at 0.9 MPa is 4523 N.
A rear-cap screw lets you shorten the stroke end by up to 75 mm from the 80 mm nominal maximum. It is a direct dimensional replacement for an SC80X80 if you match the bore, port thread (PT), and mounting style, but the SCJ body is slightly longer to house the adjustment mechanism.
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