The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 90mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X90-50 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. Its rear-cap adjusting screw provides up to 50 mm of adjustment, letting you dial in the exact stop position for a nominal 90 mm stroke without changing the cylinder. With a 20 mm piston rod, PT1/4 ports, and an M16x1.5 rod thread, it delivers 1559 N of push force at 0.5 MPa, scaling to 2805 N at the 0.9 MPa maximum operating pressure.
This 63 mm bore model uses a 28 mm air cushion to decelerate the piston smoothly at end of travel, protecting the end cap and reducing noise. The tie-rod construction keeps the body length A(SCJ) to a compact 197 mm, making it a practical drop-in for applications where the stroke needs to be adapted on the machine. It is not an ISO 15552 cylinder, so dimensional interchangeability is limited to matching AirTAC SCJ adjustable-stroke units of the same bore, stroke, and adjust range.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 90 mm |
| Stroke adjustment | Up to 50 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. |
| -50 | 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.
Fine-tune the end-of-stroke position during machine commissioning without swapping cylinders or machining external hard stops. The 50 mm adjustment range lets technicians quickly dial in the precise stopping point for a 90 mm nominal stroke.
Adjust the stroke end to accommodate different product sizes on a packaging or sorting line. The rear screw allows operators to shift the stop position by up to 50 mm in seconds, minimising downtime between production runs.
Take up mechanical play or seal wear in a clamping or pressing fixture over time. The adjustable stroke end acts as a field-serviceable stop, extending the useful life of the tooling without replacing the cylinder.
Choose the SCJ63 when you need the 1559 N push force at 0.5 MPa that this 63 mm bore provides. If your load requires less force, stepping down to the 50 mm bore yields 982 N of push; for heavier demands, the 80 mm bore offers 2513 N. The 50 mm adjustment range on this model is ideal for commissioning trials or format changes where the stop point varies significantly. If your application needs a fixed, non-adjustable stroke, the standard SC63 cylinder is a simpler and more economical choice. For a direct replacement, match the 63 mm bore, 90 mm nominal stroke, 50 mm adjust range, PT port thread, and basic mounting. At this 90 mm stroke, rod bending from side loads is not a primary concern, but always align the load axially to maximise seal and bearing life.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (the difference is due to the single 20 mm rod). At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N. The theoretical force at 1.0 MPa is 318 kgf.
You can, but only if you need the adjustable stroke feature. The SCJ63X90-50 has a rear adjusting screw that makes the body slightly longer than a fixed-stroke SC63. It is a direct replacement for another AirTAC SCJ63 with a 90 mm nominal stroke and 50 mm adjust range, matching PT ports and basic mounting.
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