The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-30 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X500-30 is a double-acting, single-rod pneumatic cylinder that lets you fine-tune the stroke end position by up to 30 mm using a rear-cap adjusting screw, without removing the cylinder from the machine. With a 63 mm bore and a 20 mm rod, it delivers 1559 N of push force at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa, making it suitable for medium-duty positioning and clamping tasks where the final stop point needs to be dialled in precisely.
This adjustable-stroke model has a nominal stroke of 500 mm and a body length A of 197 mm. The PT1/4 ports and M16x1.5 rod thread are standard, and the integrated 28 mm air cushion decelerates the piston smoothly at both ends. Because the stroke is adjustable, you can compensate for tooling wear or small format changes on the fly, reducing downtime compared to swapping fixed-stroke cylinders.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 500 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. |
| ×500 | 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, the 30 mm adjustment screw allows technicians to creep the final stop position into perfect alignment with mating fixtures or sensors, eliminating the need for shims or custom spacers.
In high-cycle pusher or stopper stations, the stroke can be incrementally extended over time to compensate for pad or gripper wear, maintaining consistent part contact without immediate replacement.
For packaging lines handling multiple box sizes, the rear screw provides a quick, tool-free way to adjust the pusher stroke end, reducing changeover time between production runs.
Choose the SCJ63X500-30 when your application needs a 500 mm stroke with the ability to shorten it by up to 30 mm during commissioning or changeovers. If you require more push force, step up to the 80 mm bore (2513 N at 0.5 MPa); for a lighter, more compact solution, the 50 mm bore provides 982 N. For applications that do not need field adjustability, the fixed-stroke SC63X500 is a direct alternative. This cylinder is a direct replacement for another AirTAC SCJ63 cylinder with the same 500 mm nominal stroke, 30 mm adjustment range, PT ports, and basic mounting. At this stroke length, ensure the rod is guided externally if significant side loads are present, or consider a guided cylinder to prevent rod bending.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (due to the 20 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N. The rear adjustment screw only changes the stroke end position, not the output force.
Yes, if you need the ability to fine-tune the stroke end. The SCJ63X500-30 shares the same bore, rod, port, and mounting interfaces as the SC63, but the body is slightly longer to house the adjusting screw. Ensure your machine has clearance for the rear mechanism.
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