The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-75 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. Ø63mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X80-75 delivers a nominal 80 mm stroke with a 75 mm rear-cap adjusting screw, letting you dial the stroke end anywhere from 5 mm to 80 mm without swapping the cylinder. At 0.5 MPa it pushes with 1559 N and pulls with 1402 N, making it a solid mid-range actuator for applications that need frequent end-position fine-tuning.
This double-acting single-rod cylinder uses a 20 mm piston rod, PT1/4 ports, and a 28 mm air cushion to decelerate the load quietly. The tie-rod body length A(SCJ) is 197 mm, and the adjustable screw adds only a few millimetres to the overall length compared to a fixed-stroke SC of the same bore.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 75 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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. |
|---|---|
| 63 | 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.
Dial in the exact end-stop position on a new assembly line without machining hard stops. The 75 mm adjustment range covers most trial-and-error positioning needs.
Compensate for pad or stop wear over time by simply turning the rear screw, restoring the original stroke end without dismounting the cylinder or replacing tooling.
Quickly adapt the stroke for different product sizes on a packaging or labelling station. One SCJ63X80-75 replaces multiple fixed-stroke cylinders for short-run flexibility.
Step up to an 80 mm bore (2513 N push at 0.5 MPa) if the 1559 N thrust is marginal; step down to 50 mm (982 N) for lighter, faster-cycling loads. The SCJ is the right pick when you need to tweak the stroke end during commissioning, format changes, or after wear-in — if the stroke is fixed and never adjusted, the standard SC series saves cost. A direct replacement must match the 63 mm bore, 80 mm nominal stroke, 75 mm adjust range, PT thread, and basic mounting. For strokes of 80 mm side-load is usually minimal, but if the rod sees any off-axis force, add an external guide rail to prevent bending and seal wear.
Adjustable-stroke checklist
At 0.5 MPa the push force is 1559 N and the pull force is 1402 N (the difference is due to the single 20 mm rod). At the maximum operating pressure of 1.0 MPa, theoretical push reaches 3118 N. Always size for your working pressure and a safety margin.
Yes, if you need the adjustable stroke feature. The SCJ63X80-75 has the same bore, rod, port, and cushion as an SC63, but the body is slightly longer to house the adjusting screw. Ensure the extra length fits your mounting envelope and that you order the same PT thread and mounting style.
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