The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-30 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X80-30 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides up to 30 mm of adjustment, letting you dial in the exact stop position during commissioning or format changes without swapping the cylinder. With a 20 mm piston rod, PT1/4 ports, and a 28 mm air cushion, it handles push forces of 1559 N at 0.5 MPa and up to 2805 N at the 0.9 MPa maximum operating pressure.
This 63 mm bore tie-rod cylinder is built on the same rugged platform as the fixed-stroke SC series, but adds a field-adjustable stroke end that is invaluable for applications requiring precise mechanical stops. The body length A(SCJ) is 197 mm, and the standard stroke range for this bore extends to 1500 mm. The default configuration includes a TPU seal for -20 to +70 °C operation and PT threaded ports.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 30 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. |
| -30 | 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.
During machine setup, technicians can back out the rear adjusting screw to precisely set the end-of-stroke position without dismounting the cylinder or machining external hard stops. The 30 mm range on the SCJ63X80-30 allows for quick iterative adjustments.
On packaging or assembly lines that handle multiple product sizes, the adjustable stroke lets operators change the cylinder's reach by up to 30 mm in seconds. This eliminates the need to stock multiple fixed-stroke cylinders for different formats.
In clamping or pressing operations where tooling or contact surfaces wear over time, the SCJ63X80-30's screw can be advanced to take up the slack. This maintains consistent clamping force and part contact without replacing the cylinder or adding shims.
Choose the SCJ63 when you need the force of a 63 mm bore—1559 N push at 0.5 MPa—with the ability to fine-tune the stroke end by up to 30 mm. If your application demands higher force, step up to the 80 mm bore (2513 N push at 0.5 MPa); for a lighter, more compact solution, the 50 mm bore delivers 982 N. When a fixed, non-adjustable stroke is sufficient, the standard SC63 series offers a simpler, cost-effective alternative. For applications where the rod must not rotate or side loads are present, consider an externally guided cylinder.
Direct replacement is straightforward: match the 63 mm bore, 80 mm nominal stroke, 30 mm adjustment range, PT port thread, and basic mounting style. If your existing unit includes a magnet or mounting bracket, specify the -S suffix for a built-in sensor magnet or add the appropriate SCJ mounting kit (FA front flange, LB foot, or TC centre trunnion with TCM1 bracket).
Adjustable-stroke checklist
At 0.5 MPa, the cylinder produces 1559 N of push force and 1402 N of pull force. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The push force is higher than the pull force because the single piston rod reduces the effective area on the return stroke.
Yes, if you need the 30 mm field-adjustable stroke end. The SCJ shares the same mounting footprint and port locations as the SC series. Ensure you match the 63 mm bore, PT1/4 ports, and basic mounting. If your SC had a magnet, order the SCJ with the -S suffix; for mounting brackets, add FA, LB, or TC to the part number.
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