The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-100 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, 90mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X90-100 is a double-acting, single-rod pneumatic cylinder offering a nominal 90 mm stroke, fully adjustable at the rear cap by up to 100 mm. This allows the effective stroke end to be fine-tuned anywhere within that range without swapping the cylinder. With a 20 mm piston rod and PT1/4 ports, it delivers a robust 1559 N of push force at 0.5 MPa, making it a versatile workhorse for applications requiring on-the-fly mechanical setup changes.
Built on a durable tie-rod construction with a 197 mm body length, this cylinder includes an adjustable pneumatic cushion (28 mm length) to decelerate the piston smoothly at stroke end. The stroke-adjust screw sets the end position mechanically; it is not a speed or force regulator. For position sensing, a magnet can be specified with the -S suffix, but this basic model relies on external flags or valves for end-of-stroke detection.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 90 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. |
| ×90 | 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 lets technicians dial in the exact stroke end-stop during machine commissioning without cutting rods or adding external hard stops, saving significant setup time.
Ideal for packaging or assembly lines running multiple product sizes. Operators can quickly adjust the cylinder's stroke end to accommodate different box heights or part positions via the rear screw.
In clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent clamping force without replacing the actuator.
Choose the SCJ63 bore when your application needs the 1559 N push force at 0.5 MPa it provides. If you require more force, stepping up to the SCJ80 bore offers 2513 N at the same pressure. For a fixed, non-adjustable stroke, the standard SC63 cylinder is a simpler, more cost-effective alternative. This SCJ63X90-100 is a direct replacement for any AirTAC SCJ63 cylinder with a 90 mm nominal stroke, 100 mm adjust range, PT ports, and basic mounting. For strokes of 300 mm or more, evaluate side-loading on the 20 mm rod; an external guide rail or a guided cylinder may be necessary to prevent rod bending.
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 area of the 20 mm piston rod. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
No. The rear adjusting screw only sets the mechanical end-of-stroke position. It does not lock or hold the piston rod. If air pressure is lost or the valve is centered, the piston can drift. An external rod lock or pilot-operated check valve is required for load holding.
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