The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, providing a 50 mm adjustment range via a rear-cap screw. This lets you fine-tune the stroke end position to 50 mm without swapping the cylinder, ideal for commissioning and format changes. With a 63 mm bore and 20 mm rod, it delivers 1559 N of push force at 0.5 MPa and up to 2805 N at 0.9 MPa. The built-in magnet enables direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
This tie-rod cylinder features a PT1/4 port, an M16x1.5 rod thread, and an adjustable air cushion (28 mm) for smooth deceleration. The body length A is 197 mm, making it a compact solution for applications where stroke-end position needs frequent, precise adjustment. As a genuine AirTAC component, it ensures consistent performance and long service life in demanding industrial environments.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 50 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. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
Fine-tune the 50 mm stroke end position during machine commissioning without removing the cylinder. The rear adjusting screw allows operators to quickly dial in the exact stopping point for grippers or pushers.
In high-cycle assembly fixtures, use the 50 mm adjustment range to compensate for wear on tooling tips or contact surfaces. A simple screw turn restores precise positioning, extending maintenance intervals.
On packaging or labeling lines, the adjustable stroke enables rapid changeover between product sizes. The -S magnet provides sensor feedback to confirm the new stroke end position for each format recipe.
Choose the SCJ63X50-50S when you need to precisely dial in a 50 mm stroke end position on a 63 mm bore platform. If your force requirement is lower, the 50 mm bore SCJ offers 982 N of push force; for higher demands, the 80 mm bore provides 2513 N at the same 0.5 MPa pressure. The adjustable stroke is the key differentiator from a fixed-stroke SC63 cylinder—select the SCJ when the final stroke length is not yet finalized or needs periodic recalibration. For a direct replacement, match the 63 mm bore, 50 mm nominal stroke, 50 mm adjustment range, PT port thread, and the -S magnet option. If the load must be held in position without air pressure, an external rod lock or pilot-operated check valve is required, as the air cushion and adjusting screw do not provide any holding function.
Adjustable-stroke checklist
The push force is 1559 N at 0.5 MPa, 2182 N at 0.7 MPa, and 2805 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the 20 mm rod area, providing 1402 N at 0.5 MPa. For a theoretical maximum at 1.0 MPa, the push force is 318 kgf.
A rear-cap screw sets the mechanical stroke end position within a 50 mm range, shortening the nominal 50 mm stroke. It does not adjust force or speed. The cylinder does not hold its position when air pressure is lost or the valve is centered; an external mechanical lock or pilot-operated check valve is needed for load holding.
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