The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X300-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø63mm bore, 300mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X300-10 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the piston stop position by up to 10 mm without swapping the unit. At 0.5 MPa it delivers 1559 N of push force and 1402 N of pull force, driven through a 20 mm rod with PT1/4 ports and an M16x1.5 rod thread.
This model uses a 300 mm nominal stroke within the 1500 mm maximum for the 63 mm bore, and its tie-rod body has a 197 mm base length (A dimension). The adjustable screw is located in the rear cap and shortens the stroke end only; it does not alter the cylinder's force output or speed capability. Air cushioning is 28 mm long to decelerate the piston smoothly.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X300-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 10 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. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -10 | 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 setup, the 10 mm rear adjustment screw lets technicians precisely set the stroke end for part placement without re-plumbing or swapping cylinders, saving hours of trial-and-error.
In high-cycle material handling, mechanical stops can wear down over time. The SCJ's adjustable stroke compensates for this wear by advancing the piston end position, maintaining consistent product positioning.
For packaging lines that run multiple box sizes, the adjustable stroke allows a single cylinder to be quickly reset to different push lengths, eliminating the need for a separate actuator for each format.
Choose the SCJ63X300-10 when you need to dial in a precise end position during commissioning or after tooling wear. If your application demands more force, step up to the 80 mm bore which provides 2513 N of push at 0.5 MPa; for a lighter, more compact solution, the 50 mm bore offers 982 N. For a fixed, non-adjustable stroke, the standard SC63X300 is a direct alternative.
At 300 mm of stroke, side-loading on the 20 mm rod can cause bending or seal wear if the load is not guided. Use an external guide rail or switch to a guided cylinder when the load is not supported linearly. A direct replacement must match the 63 mm bore, 300 mm nominal stroke, 10 mm adjust range, PT port thread, and basic mounting style.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, this cylinder delivers 1559 N of push force and 1402 N of pull force. The push force is higher because it acts on the full 63 mm bore area, while the pull force subtracts the 20 mm rod area. At the maximum 0.9 MPa, push force reaches 2805 N.
Yes, provided the mounting footprint and port connections match. The SCJ63X300-10 is a direct replacement for another AirTAC SCJ63X300-10 with the same bore, 300 mm nominal stroke, and 10 mm adjustment range. It is not a dimensional drop-in for an ISO 15552 cylinder, as the SCJ series uses a tie-rod construction.
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