The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X250-30 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, 250mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X250-30 is a double-acting, single-rod pneumatic cylinder with a 30 mm adjustable stroke range, letting you fine-tune the end position on the fly. Its 63 mm bore delivers 1559 N of push force at 0.5 MPa, while the 20 mm piston rod provides robust guidance for industrial tasks.
A rear-cap adjusting screw shortens the 250 mm nominal stroke by up to 30 mm without dismounting the cylinder. The body length A(SCJ) is 197 mm, and the 28 mm air cushion decelerates the piston smoothly at stroke end. The PT1/4 port and M16x1.5 rod thread make it a direct fit for standard AirTAC SCJ mounting accessories.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X250-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 250 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. |
| ×250 | 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.
Engineers can dial in the exact 250 mm stroke end position during machine commissioning using the 30 mm rear screw, eliminating the need for custom-cut external stops.
On packaging lines, the adjustable stroke compensates for wear on mechanical end-stops over time, maintaining precise placement without cylinder replacement.
Quickly adjust the stroke end for different product sizes on a single machine, reducing changeover time compared to swapping fixed-stroke cylinders.
Choose this 63 mm bore when the 50 mm bore's 982 N push at 0.5 MPa is insufficient, but the larger 80 mm bore's 2513 N push is overkill for your load. The SCJ63X250-30 is ideal where a 250 mm nominal stroke needs field trimming for commissioning or format changes. If your application requires a fixed, non-adjustable stroke, the standard SC63X250 is a simpler, slightly shorter alternative.
For a drop-in replacement, match the bore (63 mm), nominal stroke (250 mm), 30 mm adjust range, PT1/4 port, and basic mounting. At this 250 mm stroke, ensure the load is guided to prevent excessive side-loading on the 20 mm rod; for unsupported loads, add an external guide rail or switch to a guided cylinder.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The pull force is lower due to the 20 mm piston rod area. The maximum push force at the 0.9 MPa operating limit is 2805 N.
Yes, this is a direct dimensional and performance replacement for any AirTAC SCJ63 cylinder with a 250 mm nominal stroke and 30 mm adjust range. Ensure the port thread (PT) and basic mounting match your existing setup. It is not dimensionally interchangeable with ISO 15552 cylinders.
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