The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X225-30 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, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X225-30 is a 63 mm bore double-acting single-rod cylinder whose standout feature is a rear-cap adjusting screw that gives you 30 mm of field-adjustable stroke-end control. At 0.5 MPa it delivers 1559 N of push force and 1402 N on the pull stroke, making it a strong mid-range actuator for tasks that need a precise, repeatable end stop without swapping hardware.
With a 20 mm piston rod and PT1/4 pneumatic ports, this tie-rod cylinder uses an adjustable air cushion (28 mm long) to decelerate the piston smoothly. The body length A(SCJ) is 197 mm, and the nominal 225 mm stroke is well within the 1500 mm maximum for this bore. It runs on 40 µm filtered air from 0.15 to 1.0 MPa and suits ambient temperatures of -20 to +70 °C.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X225-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 225 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. |
| ×225 | 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.
Dial in the exact stroke end during machine commissioning without cutting guide rails or adding external hard stops. The 30 mm screw adjustment lets you fine-tune the stopping position quickly.
On packaging or assembly lines that run multiple product sizes, the adjustable stroke lets operators shift the end position by up to 30 mm between batches, reducing changeover time.
Compensate for tooling or gripper wear over time by advancing the stroke end slightly with the rear screw, keeping the working position accurate without replacing the cylinder.
Pick this 63 mm bore when the 50 mm model (982 N push at 0.5 MPa) is slightly underpowered but the 80 mm unit (2513 N push) would be oversized for your fixture. The 30 mm adjustment range is ideal for commissioning trials and format changeovers where the stroke needs fine-tuning. If you need a fixed, non-adjustable stroke, the standard SC63X225 is the direct alternative.
For replacement, match the bore, 225 mm nominal stroke, 30 mm adjust range, PT port thread, and basic mounting. This model has no magnet; if you need piston-position sensing, order the -S variant and add a CMSG or DMSG sensor. At strokes above 300 mm, side-loading becomes a concern, but at 225 mm the rod is well-supported for inline loads.
Adjustable-stroke checklist
At 0.5 MPa the push force is 1559 N and the pull force is 1402 N. At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 3118 N. The pull force is always lower because the rod reduces the effective piston area on the return stroke.
Yes, if you no longer need the adjustable feature. The SC63X225 has the same bore, rod, port, and cushion dimensions. However, the SCJ body is slightly longer to house the adjusting screw, so check your mounting envelope. The mounting accessories (FA, LB, TC) are shared between SC and SCJ.
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