The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X65-50S 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. Ø50mm bore, 65mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X65-50S is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a nominal 65 mm stroke, delivering a push force of 982 N at 0.5 MPa. Its defining feature is the rear-cap adjusting screw, which provides a 50 mm field-adjustable range to fine-tune the stroke end position without removing the cylinder. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
With a 20 mm diameter piston rod and PT1/4 ports, this tie-rod cylinder uses a TPU seal for standard operation from -20 to +70 °C. The adjustable air cushion decelerates the piston smoothly at the end of travel, and the body length A is 194 mm, making it a compact solution for applications where the final stop point needs precise, repeatable mechanical adjustment.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X65-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 65 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, 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. |
| ×65 | 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.
Engineers can precisely set the end-stop position during initial machine setup, accommodating mechanical stack-up tolerances without needing to shim or reposition the entire cylinder.
Quickly adjust the stroke end for different product sizes on a packaging or sorting line. The 50 mm adjustment range allows a single cylinder to handle multiple formats, reducing changeover time.
In clamping or pressing applications, the stroke can be incrementally extended over time to compensate for wear on tooling or contact surfaces, maintaining consistent process force and position.
Choose the SCJ50X65-50S when you need to dial in a precise stop position on a machine during commissioning or changeovers. If 982 N of push force is insufficient, stepping up to the 63 mm bore provides 1559 N at the same pressure. For applications that do not require stroke adjustability, a fixed-stroke SC50 cylinder is a simpler alternative. This model is a direct replacement for any AirTAC SCJ50 cylinder with a 65 mm nominal stroke, a 50 mm adjust range, PT ports, and a magnet.
For strokes of this length, side-loading is generally minimal, but ensure the load is guided if any radial force is present. The basic mounting configuration allows you to add the specific mounting accessories you need, such as an FA front flange or LB foot mount, using the F-SC50 series brackets.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the push force is 982 N. The pull force on the return stroke is 825 N due to the area of the 20 mm rod. The maximum push force at the 0.9 MPa limit is 1767 N.
The stroke is adjusted by a screw in the rear end cap that limits the piston's retraction, effectively shortening the stroke end by up to 50 mm. It is a mechanical stop, not a speed control. For speed regulation, you must use external flow control valves in the port connections.
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