The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-20STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X80-20STC is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw, allowing you to fine-tune the stroke end position by up to 20 mm without removing the cylinder from the machine. This model delivers 1559 N of push force at 0.5 MPa, making it a strong performer for mid-range industrial tasks where precise end-stop calibration is needed during commissioning or format changes.
Equipped with a built-in magnet and a centre trunnion (TC) mount, this unit is ready for sensor-based position feedback and pivoting applications. The 20 mm rod, PT1/4 ports, and 28 mm air cushion provide reliable deceleration. Its body length A(SCJ) is 197 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-20STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 20 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. |
| -20 | 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.
Ideal for commissioning automated test fixtures where the final actuator position must be dialed in precisely on-site. The 20 mm adjustment screw allows operators to compensate for assembly tolerances without reprogramming the controller.
The TC centre trunnion mount allows the cylinder to swing, making it perfect for actuating diverter gates on packaging conveyors. The adjustable stroke lets you fine-tune the gate's open angle to handle different package sizes.
In high-cycle clamping operations, the adjustable stroke can be used to take up slack as gripper pads wear down over time, maintaining consistent clamping force without replacing the tooling immediately.
Choose the SCJ63 bore when your application needs around 1559 N of push force at standard plant pressure. If you require more force, stepping up to the 80 mm bore provides 2513 N of push at 0.5 MPa. For a simpler, fixed-stroke solution without the rear adjuster, the standard SC63 cylinder is a direct alternative. This SCJ63X80-20STC is a direct replacement for another AirTAC SCJ cylinder of the same 63 mm bore, 80 mm nominal stroke, 20 mm adjust range, PT ports, centre trunnion mounting (F-SC63TC), and magnet sensor capability.
Adjustable-stroke checklist
The rear cap has an adjusting screw that limits how far the piston can retract, effectively shortening the stroke end by up to 20 mm. The nominal 80 mm stroke is the maximum; you can set any shorter stroke within that 20 mm range, but the cylinder's output force (1559 N push at 0.5 MPa) remains unchanged.
No. Like all standard pneumatic cylinders, the SCJ63X80-20STC will drift or drop its load if air pressure is exhausted or the directional valve is centered. The air cushion only decelerates the piston at stroke end, and the adjusting screw only sets the end position; neither acts as a lock. For load holding without live pressure, you must add an external rod brake or a pilot-operated check valve.
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