The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X20-10 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 20mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X20-10 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly on the machine. Its rear-cap adjusting screw provides up to 10 mm of field-adjustable stroke reduction, letting you dial in the exact 20 mm nominal stroke end position during commissioning or format changes without adding external hard stops.
Built on the rugged SC tie-rod platform, this 50 mm bore unit delivers 982 N of push force at 0.5 MPa and 1767 N at the 0.9 MPa maximum operating pressure. The 20 mm piston rod, PT1/4 ports, and 21 mm air cushion make it a direct, adjustable replacement for fixed-stroke setups that need a quick tweak range.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X20-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 20 mm |
| Stroke adjustment | Up to 10 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, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×20 | Nominal (maximum) stroke length in mm. |
| -10 | 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 retract end position of a compact clamp or stop during machine build and runoff. The 10 mm screw adjustment lets technicians dial in the exact contact point without shimming or re-machining brackets.
Adjust the stroke end of a short-throw ejector cylinder to perfectly synchronize with a conveyor flight or pick-and-place sequence. The 982 N push force handles light to medium ejection loads reliably.
Take up mechanical wear in a short-stroke pressing or stamping fixture. As tooling faces wear over thousands of cycles, the rear screw can be advanced in small increments to restore the original working position.
Choose the SCJ50X20-10 when your application needs a compact 20 mm stroke with the ability to trim the end position by up to 10 mm. If you require more force, stepping up to the 63 mm bore provides 1559 N of push force at the same 0.5 MPa. For applications where the stroke length is permanently fixed and never needs field adjustment, the standard SC50X20 fixed-stroke cylinder is a simpler, cost-effective alternative. A direct replacement must match the 50 mm bore, 20 mm nominal stroke, 10 mm adjust range, PT1/4 ports, and basic mounting style.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. The push force is higher because the single piston rod reduces the effective area on the retract side. At the maximum 0.9 MPa operating pressure, push force reaches 1767 N.
Yes, the SCJ50X20-10 shares the same 50 mm bore, 20 mm rod, PT1/4 ports, and tie-rod body dimensions as the SC50. The key difference is the rear adjusting screw, which adds a small amount to the overall length but allows you to shorten the stroke end by up to 10 mm. Ensure your mounting arrangement has clearance for the rear adjuster.
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