The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X140-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø63mm bore, 140mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X140-100 is a double-acting, single-rod pneumatic cylinder that puts a 100 mm adjustable stroke range at your fingertips, letting you fine-tune the stroke end from 40 mm up to the nominal 140 mm without swapping the cylinder. With a 20 mm rod and PT1/4 ports, it delivers a substantial 1559 N of push force at 0.5 MPa, making it a reliable workhorse for mid-range automation tasks.
This model’s 28 mm air cushion decelerates the piston smoothly, while the rear adjusting screw provides a mechanical end-stop that is independent of the valve control. The tie-rod construction and 197 mm body length (A dimension) keep it compact for its 63 mm bore, and it remains a direct, drop-in replacement for any other AirTAC SCJ63X140-100 with basic mounting and PT threads.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X140-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 140 mm |
| Stroke adjustment | Up to 100 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. |
| ×140 | Nominal (maximum) stroke length in mm. |
| -100 | 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.
The 100 mm adjustment range allows technicians to dial in the exact stroke end position during initial machine setup, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error commissioning.
In clamping or pressing fixtures, the adjustable stroke can be periodically shortened to compensate for wear on tooling or workpieces, maintaining consistent clamp force without replacing the actuator.
For conveyor line gates or part stops handling different product sizes, a single SCJ63X140-100 can be quickly re-adjusted on the line to change the stopping position, drastically reducing changeover time between batches.
Step up to the 80 mm bore if your application demands more than the 1559 N push force this 63 mm bore provides at 0.5 MPa; the SCJ80 series offers 2513 N. For applications that never need stroke adjustment, a fixed-stroke SC63X140 is a simpler, cost-effective alternative. If the load creates significant side forces, especially at this 140 mm stroke, consider an external guide rail or a guided cylinder to protect the rod bearing.
This unit is a precise replacement for any SCJ63X140-100 with a basic mount, PT threads, and no magnet. When ordering a direct swap, match the 63 mm bore, 140 mm nominal stroke, 100 mm adjustment range, and PT port thread to ensure full mechanical and pneumatic compatibility.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this cylinder generates 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. The pull force is lower because the 20 mm piston rod reduces the effective area on the return stroke.
A rear-cap screw lets you shorten the stroke end by up to 100 mm, so the effective stroke can be field-set anywhere between 40 mm and 140 mm. It is a direct mechanical replacement for a fixed SC63 only if your application requires this specific adjustable range and you accept the slightly longer body length; the mounting footprint and port locations are identical.
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