The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X230-75S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø50mm bore, 230mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X230-75S is a double-acting, single-rod pneumatic cylinder with a 50mm bore and a nominal stroke of 230mm, featuring a rear-cap adjusting screw that allows the stroke end to be shortened by up to 75mm in the field. This model includes a built-in magnet (denoted by the -S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for precise end-of-stroke detection. At 0.5 MPa, it delivers 982 N of push force and 825 N on the pull stroke, driven by its 20mm diameter piston rod.
With a PT1/4 port and an M16x1.5 rod thread, this cylinder is built for reliable integration into standard pneumatic circuits. The 21mm adjustable air cushion at each end decelerates the piston, protecting the end caps from impact. The body length A dimension for this SCJ series is 194mm, providing a compact footprint for its force class. As a genuine AirTAC component, it ensures consistent performance and availability for your adjustable-stroke applications.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X230-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 230 mm |
| Stroke adjustment | Up to 75 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. |
| ×230 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
During machine setup, the 75mm adjustment screw allows engineers to dial in the exact stop position for a 50mm bore actuator without fabricating custom shims or stops, saving hours of mechanical adjustment time.
In clamping or pressing fixtures, the adjustable stroke can be extended over time to compensate for wear on tooling or the workpiece contact surface, maintaining consistent clamp force without replacing the cylinder.
For packaging or assembly lines running different product sizes, the stroke end can be quickly re-set via the rear screw to handle a new format, making the changeover process faster and tool-free.
Select the SCJ50X230-75S when your machine requires a precise, field-tunable stroke end point within a 75mm window, eliminating the need for external hard stops. If your force requirements increase, stepping up to a 63mm bore provides 1559 N of push force at the same 0.5 MPa. For applications demanding a fixed, non-adjustable stroke, the standard SC series is a more economical choice. This cylinder is a direct replacement for an existing AirTAC SCJ50 with a 230mm nominal stroke, a 75mm adjust range, PT ports, and a magnetic piston. For strokes of this length, ensure the rod is not subjected to significant side loads; if lateral forces are present, an external guide rail or a guided cylinder solution is necessary to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
The rear cap has an integrated adjusting screw that acts as an internal, movable end stop for the piston. By turning this screw, you can shorten the retracted stroke end position by up to 75mm from its nominal 230mm maximum. It adjusts the stroke end, not the cylinder's force or speed.
At the standard operating pressure of 0.5 MPa, the SCJ50X230-75S generates 982 Newtons of push force and 825 Newtons of pull force. The pull force is lower because the 20mm piston rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the push force reaches 1767 N.
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