The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X450-10S 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X450-10S is a double-acting single-rod pneumatic cylinder that puts fine stroke-end tuning directly on the machine. Its rear-cap adjusting screw provides up to 10 mm of retraction adjustment from the 450 mm nominal stroke, letting commissioning engineers dial in the exact end position without adding external hard stops. The 50 mm bore delivers 982 N of push force at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), so standard CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback. The 20 mm piston rod, PT1/4 ports, and 21 mm air cushion are standard for the 50 mm bore. The body length A(SCJ) is 194 mm plus stroke, making it a compact choice for applications where the stroke needs to be field-trimmed during setup or product changeover.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X450-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 450 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. |
| ×450 | 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.
The 10 mm adjusting screw lets technicians fine-tune the retracted end stop on a 450 mm stroke actuator during initial machine setup, eliminating the need to shim or reposition the entire cylinder.
On a packaging line, the adjustable stroke compensates for wear on a mechanical stop pad over time. A quick turn of the rear screw restores the precise retracted position without swapping the cylinder.
In a converting machine, operators adjust the stroke end by up to 10 mm when switching between product formats, using the built-in magnet sensors to confirm the new position is reached every cycle.
Choose the SCJ50 bore when your application needs roughly 1000 N of push force at standard plant air. If you can accept less force and a smaller envelope, stepping down to the SCJ40 (628 N push at 0.5 MPa) saves space and air consumption. For higher cycle rates or heavier tooling, the SCJ63 delivers 1559 N push at the same pressure. This 450 mm stroke is well within the 1200 mm maximum for the 50 mm bore, but at this extended length, ensure the rod is guided externally if the load applies any side force; otherwise, a guided cylinder or external linear rail will prevent rod bending and premature seal wear. The adjustable-stroke SCJ is the right pick over a fixed-stroke SC when you anticipate needing to shift the retracted end position by a few millimetres after installation. For direct replacement, match an AirTAC SCJ50X450-10S with PT ports, basic mount, and the -S magnet option.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 982 N and the pull force is 825 N (the difference is due to the 20 mm single piston rod). At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N. The theoretical force at 1.0 MPa is 200 kgf.
Yes, provided the additional body length for the adjusting screw is accommodated. The SCJ50X450-10S matches the 50 mm bore, 450 mm nominal stroke, PT1/4 ports, and basic mounting of an SC50X450. The -S magnet adds sensor compatibility. Ensure the 10 mm adjustment range suits your process; if you need the stroke to be exactly 450 mm with no adjustability, the fixed-stroke SC is the simpler choice.
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