The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-20 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, 90mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X90-20 is a double-acting, single-rod pneumatic cylinder that puts a 20 mm field-adjustable stroke range at your fingertips via a rear-cap screw. At 0.5 MPa it delivers 1559 N push and 1402 N pull, using a 20 mm piston rod and PT1/4 ports. The 28 mm air cushion decelerates the load smoothly, and the tie-rod body (A length 197 mm) is built for straightforward maintenance.
Because the stroke end is adjustable, you can fine-tune the 90 mm nominal stroke during commissioning or format changes without removing the cylinder. The operating range is 0.15–1.0 MPa, with a proof pressure of 1.5 MPa, and the standard TPU seal works from -20 to +70 °C. This basic model ships without a magnet or mounting bracket, ready for your own sensor and mount setup.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 90 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. |
| ×90 | 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.
Dial in the exact 90 mm stroke end position during machine bring-up. The 20 mm rear screw lets technicians fine-tune the stop without swapping cylinders or fabricating external hard stops.
On packaging or assembly lines, quickly adjust the cylinder stroke for different product sizes. The SCJ63X90-20 eliminates the need for multiple fixed-stroke cylinders when formats change.
In pressing or clamping fixtures, use the 20 mm adjustment to compensate for tooling wear over time. Maintain consistent contact force without reprogramming or adding shims.
Choose the SCJ63 bore when your application needs roughly 1560 N of push force at standard shop air. If you need less force, the SCJ50 delivers 982 N push at 0.5 MPa; for more, the SCJ80 provides 2513 N. The 20 mm adjust range on this model is ideal for taking up tolerance stack or setting a precise end stop on a 90 mm stroke.
For a direct replacement, match the 63 mm bore, 90 mm nominal stroke, 20 mm adjust range, PT1/4 port, and basic mounting. If your load needs a pivot mount, order the SCJ63X90-20TC for the centre trunnion kit. Should your application require fixed, repeatable stroke lengths with no field adjustment, the standard SC63X90 fixed-stroke cylinder is a simpler, lower-cost alternative.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder produces 1559 N pushing and 1402 N pulling (the difference is due to the 20 mm single rod). At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 3118 N. Always apply a safety factor for real-world dynamic loads.
Yes, if you need field adjustability. The SCJ63X90-20 shares the same bore, rod, port, and mounting accessories as the SC63. Ensure the 20 mm rear screw housing fits your available space, as the SCJ body is slightly longer than the fixed-stroke SC. Match the nominal 90 mm stroke and PT1/4 port for a direct retrofit.
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