The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-50STC 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, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-50STC is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 50mm nominal stroke by up to 50mm without swapping the unit. At 0.5 MPa, it delivers 1559 N of push force and 1402 N on the pull stroke, driven by a 20mm diameter piston rod through PT1/4 ports.
This model includes a built-in magnet for CMSG/DMSG/EMSG sensors and ships with a centre trunnion (TC) mount and TCM1 bracket, ideal for pivoting applications. The 28mm air cushion decelerates the piston smoothly, and the rear adjusting screw sets the exact stroke end position for commissioning or format changes.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 50 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. |
| ×50 | 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.
Adjust the stroke end by up to 50mm during machine setup to dial in the exact stop position without removing the cylinder or adding external hard stops.
Quickly adapt the cylinder's end position for different product sizes on a packaging line, reducing downtime between batches with a simple screw adjustment.
Take up mechanical wear in tooling or linkages over time by advancing the stroke end, maintaining precise operation without replacing the actuator.
Choose the SCJ63 bore when your application needs the 1559 N push force at 0.5 MPa; stepping down to a 50mm bore reduces push to 982 N, while moving up to an 80mm bore increases it to 2513 N. The adjustable stroke is perfect for setups requiring end-position tweaking, but if your stroke is fixed, a standard SC63 cylinder is a simpler, cost-effective alternative.
For direct replacement, match the 63mm bore, 50mm nominal stroke, 50mm adjust range, PT port thread, centre trunnion mounting (F-SC63TC), and built-in magnet. For strokes of 300mm or more, consider an external guide or guided cylinder to manage side-load and prevent rod bending.
Adjustable-stroke checklist
At 0.5 MPa, it generates 1559 N pushing and 1402 N pulling. The maximum push force at 0.9 MPa is 2805 N. The adjusting screw only changes the stroke end position, not the output force.
Yes, if you need the 50mm adjustable range. The SCJ63 shares the same bore, rod, and port dimensions as the SC63. Ensure you match the nominal stroke, adjust range, mounting (TC with TCM1 bracket), magnet option, and PT thread for a direct fit.
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