The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X55-30S 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, 55mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X55-30S is a double-acting, single-rod pneumatic cylinder from AirTAC's tie-rod series, engineered for applications where the stroke end position must be fine-tuned on the machine. A rear-cap adjusting screw provides up to 30 mm of field-adjustable stroke reduction, letting you dial in the exact stopping point without swapping the cylinder or adding external hard stops. With a 63 mm bore and 20 mm rod, it delivers 1559 N of push force at 0.5 MPa, rising to 2805 N at the 0.9 MPa maximum operating pressure.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for reliable, non-contact position feedback. The body length A(SCJ) is 197 mm, and the adjustable air cushion decelerates the piston smoothly at both ends. Operating on 40 µm filtered air from 0.15 to 1.0 MPa, it suits ambient temperatures from -20 to +70 °C with its standard TPU seals.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X55-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 55 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. |
| ×55 | 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 commissioning, the 30 mm rear adjustment screw lets technicians precisely dial in the actuator's end stop to match tooling or workpiece positions without iterative mechanical shimming.
In high-cycle pick-and-place or clamping stations, the adjustable stroke can be periodically tweaked to compensate for gripper pad wear or mechanical play, maintaining consistent contact force and position.
On packaging or assembly lines running multiple product sizes, operators can quickly change the stroke end position via the rear screw to accommodate different box heights or component lengths.
Step up to an 80 mm bore SCJ80 if you need more force—the SCJ80 provides 2513 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC63 fixed-stroke cylinder is a more economical choice. If the load creates significant side forces, especially with this 55 mm stroke, consider pairing the cylinder with an external guide or switching to a guided cylinder. A direct replacement must match the 63 mm bore, 55 mm nominal stroke, 30 mm adjustment range, PT port thread, and built-in magnet; the basic mounting style means no additional brackets are included, but you can add FA, LB, or TC mounts from the SCJ accessory subset if needed.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 1559 N and the pull force is 1402 N (reduced due to the 20 mm piston rod area). At the maximum 0.9 MPa operating pressure, the push force increases to 2805 N.
Yes. The -S suffix in the model code indicates a built-in magnet is fitted to the piston. This allows you to clamp AirTAC CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the cylinder barrel's sensor grooves for end-of-stroke or mid-stroke position sensing.
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