Airtac SCJ50 Standard Cylinder SCJ50X200-75S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X200-75S 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, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke200 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X200-75S
The SCJ50X200-75S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, offering 982 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides a 75 mm range to fine-tune the stroke end position without swapping the cylinder, making it ideal for commissioning and format changeovers. The 20 mm rod and M16x1.5 knuckle thread deliver robust linear motion, while the built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for end-of-stroke detection.
With a 200 mm nominal stroke and a 21 mm air cushion, this tie-rod cylinder decelerates the piston smoothly at each end of travel. The body length A(SCJ) is 194 mm, and the PT1/4 port supplies consistent air flow for speeds from 30 to 800 mm/s. This model includes a factory-installed magnet, enabling easy integration with reed or solid-state sensors for precise position feedback in automated systems.
Airtac SCJ50 Standard Cylinder SCJ50X200-75S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X200-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 200 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.
Theoretical Output Force (Ø50mm)
| 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.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X200-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×200 | 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.
Where the Airtac SCJ50 Standard Cylinder SCJ50X200-75S Is Used
Commissioning & Setup
Easily fine-tune the actuator's end position during initial machine commissioning. The 75 mm adjustment screw eliminates the need for shims or custom mechanical stops, saving hours of setup time.
Format Changeover
Quickly adapt a packaging machine's pusher stroke for different box sizes. Operators can adjust the stroke end by hand to accommodate a new product format without any cylinder disassembly.
Wear Compensation
In clamping or pressing fixtures, use the adjustable stroke to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent clamp force without reprogramming the machine controller.
Is the Airtac SCJ50 Standard Cylinder SCJ50X200-75S the Right Cylinder?
Choose the SCJ50X200-75S when you need to dial in a precise stroke end within a 75 mm window during setup or product changeover. For applications requiring more force, stepping up to the 63 mm bore provides 1559 N of push at 0.5 MPa; for lighter, more compact needs, the 40 mm bore delivers 628 N. If your stroke length is fixed and never needs adjustment, the standard SC series offers a simpler, cost-effective alternative. For a direct replacement, match the 50 mm bore, 200 mm nominal stroke, 75 mm adjust range, PT port thread, basic mounting, and the -S magnet option. At this 200 mm stroke, ensure the rod is guided externally if significant side loads are present to prevent bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-75)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X200-75S FAQ
At the standard operating pressure of 0.5 MPa, this cylinder provides 982 N of push force and 825 N of pull force. The push force is higher because the single rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 200 kgf.
Only if you no longer need the field-adjustable stroke feature. An SCJ cylinder has a rear adjusting screw that sets the stroke end within a 75 mm range. A fixed-stroke SC cylinder of the same bore and 200 mm stroke will fit the same mounting footprint but will not provide any stroke length adjustability.
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