The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-20 is a double-acting, single-rod pneumatic cylinder with a 20 mm rear adjusting screw, letting you dial in the exact stroke end position on the machine. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa and up to 2805 N at the maximum operating pressure of 0.9 MPa, making it a solid mid-range actuator for tasks that need both power and precision.
This model uses a 20 mm piston rod and PT1/4 ports, with an adjustable air cushion to decelerate the load smoothly. The body length A is 197 mm, and the standard stroke of 200 mm is well within the 1500 mm maximum for this bore, so it ships as a standard catalog item. The stroke-end screw only shortens the stroke within the 20 mm range; it does not alter the cylinder's force output or speed capability.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 20 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. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -20 | 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 20 mm adjustment screw allows technicians to precisely dial in the actuator's end stop for a perfect fit, eliminating the need to shim or modify mounting brackets.
On a packaging line switching between box sizes, the adjustable stroke lets operators quickly reset the pusher's travel to match a new format without replacing the cylinder or mechanical stops.
In clamping or pressing applications, the adjustable stroke end can be used to take up slack as tooling or contact surfaces wear down over time, maintaining consistent clamping force.
Choose the SCJ63X200-20 when you need to fine-tune a 200 mm stroke by up to 20 mm during commissioning or changeovers. If your force requirement is lower, the 50 mm bore SCJ50 series provides 982 N of push at 0.5 MPa in a lighter package; for more force, step up to the 80 mm bore which delivers 2513 N. If you never need to adjust the stroke after installation, the fixed-stroke SC63X200 is a simpler, more cost-effective alternative.
For a direct replacement, match the 63 mm bore, 200 mm nominal stroke, 20 mm adjustable range, PT port thread, and basic mounting. This 200 mm stroke is substantial; if the rod is subjected to off-axis loading, consider an external guide rail or a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. Because it is a single-rod cylinder, the push force is higher than the pull force. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 3118 N.
Yes, this is a direct dimensional and performance replacement for any AirTAC SCJ63 cylinder with a 200 mm nominal stroke and a 20 mm adjustment range. Ensure the port thread (PT), mounting style (basic), and magnet option (none) match your original configuration.
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