The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-50S 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 SCJ63X90-50S is a double-acting, single-rod pneumatic cylinder that delivers 1559 N of push force at 0.5 MPa, making it a solid mid-range actuator for industrial tasks. Its rear-cap adjusting screw provides a 50 mm stroke-end adjustment range, letting you fine-tune the piston stop on the fly without swapping the cylinder or adding external hard stops.
This model includes a built-in magnet (-S suffix), so CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. With a 20 mm rod, PT1/4 ports, and a 28 mm air cushion, the 63 mm bore unit handles speeds of 30-800 mm/s and fits into setups where commissioning tweaks or format changes demand a variable stroke.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-50S |
|---|---|
| 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.
Dial in the exact stroke end during machine bring-up. The 50 mm screw range lets technicians fine-tune the piston stop without cutting brackets or re-mounting the cylinder.
Adjust the push or stop position when a packaging line switches between product sizes. The rear screw makes the change in seconds, keeping changeover time to a minimum.
Take up mechanical play or seal wear over time by slightly extending the effective stroke. The 28 mm air cushion still decelerates the load smoothly at the new end position.
Choose the SCJ63 when you need around 1559 N of push at standard line pressure—stepping down to a 50 mm bore drops push to 982 N at 0.5 MPa, while moving up to an 80 mm bore nearly doubles it to 2513 N. If your application never requires stroke adjustment, the fixed-stroke SC63 is a simpler, slightly shorter alternative; for guided or high-side-load moves, pair the cylinder with an external guide or switch to a guided actuator.
To replace an existing unit, match the 63 mm bore, 90 mm nominal stroke, and the full 50 mm adjust range (-50). This SCJ63X90-50S uses PT threads, a basic mount, and the built-in magnet—confirm the same port type, mounting style, and sensor requirement on the outgoing cylinder before ordering.
Adjustable-stroke checklist
At 0.5 MPa the cylinder produces 1559 N pushing and 1402 N pulling (the pull force is lower because the 20 mm rod reduces the piston area on the return side). At the maximum operating pressure of 1.0 MPa, push force reaches 3118 N.
Yes, if the mounting, port thread (PT), and magnet option match. The SCJ63 body is slightly longer to house the adjusting screw, so check the 197 mm base length against your available space. The 50 mm adjust range lets you replicate the fixed 90 mm stroke and still have room to tune it.
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