The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X225-30S 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, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X225-30S delivers 1559 N of push force at 0.5 MPa, combining a 225 mm nominal stroke with a 30 mm field-adjustable range via the rear screw. This single-rod, double-acting tie-rod cylinder uses a 20 mm rod and PT1/4 ports, with a 28 mm air cushion for smooth end-of-stroke deceleration.
A built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable position feedback. The body length A is 197 mm, making it a compact solution for applications needing stroke-end fine-tuning without swapping the cylinder.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X225-30S |
|---|---|
| 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.
Adjust the stroke end in 30 mm increments during machine setup to dial in the exact stopping position without mechanical rework.
Quickly adapt the cylinder stroke for different product sizes on a packaging line by turning the rear adjusting screw.
Take up mechanical play in clamping or pressing tools over time by extending the effective stroke end, maintaining consistent force application.
Step up to the 80 mm bore for 2513 N of push force at the same pressure, or down to the 50 mm bore at 982 N if a smaller footprint is needed. For fixed-stroke applications without field adjustment, the standard SC series is a simpler alternative. This model matches any AirTAC SCJ63 cylinder with a 225 mm nominal stroke, 30 mm adjust range, PT ports, and a magnet.
At this stroke length, ensure the rod is supported against side loads; an external guide rail or a guided cylinder may be required to prevent bending.
Adjustable-stroke checklist
A rear-cap screw limits the piston's extended position, shortening the nominal 225 mm stroke by up to 30 mm. This sets the stroke end mechanically without affecting the cylinder's bore or force output.
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The force is higher on the push stroke because the single rod reduces the piston area on the pull side.
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