Airtac SCJ50 Standard Cylinder SCJ50X180-30S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X180-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø50mm bore, 180mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke180 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X180-30S
The SCJ50X180-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, offering a nominal 180mm stroke that can be shortened by up to 30mm via the rear-cap adjusting screw. With a 50mm bore and 20mm piston rod, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a practical actuator for applications where the end position needs fine-tuning during commissioning or changeover without replacing the cylinder.
This model includes a built-in magnet, allowing easy mounting of CMSG/DMSG/EMSG sensors directly to the tie-rod barrel for precise end-of-stroke sensing. The cylinder body length is 194 mm (A dimension), and it features a PT1/4 port with an M16x1.5 rod thread. The adjustable air cushion decelerates the piston smoothly at both ends, protecting the end caps over millions of cycles.
Airtac SCJ50 Standard Cylinder SCJ50X180-30S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X180-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 180 mm |
| Stroke adjustment | Up to 30 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 SCJ50X180-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×180 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ50X180-30S Is Used
Commissioning & Setup
Fine-tune the end position of a material stop on a conveyor line during initial machine setup, dialing in the exact 180mm stroke with up to 30mm of adjustment without swapping hard stops.
Wear Compensation
Adjust the stroke end of a clamping jaw on a welding fixture to compensate for electrode wear over time, maintaining consistent clamping pressure without reprogramming the PLC.
Format Changeover
Quickly adapt the stroke of a pusher arm on a packaging machine for different box sizes. The 30mm adjustment range allows operators to set the new push length in seconds.
Is the Airtac SCJ50 Standard Cylinder SCJ50X180-30S the Right Cylinder?
Choose the SCJ50X180-30S when you need a mid-range force actuator with the flexibility to dial in the stroke end on the machine. If the 982 N push force at 0.5 MPa is insufficient, stepping up to a 63mm bore provides 1559 N of push force; if it is excessive, a 40mm bore delivers 628 N. For applications requiring a fixed, non-adjustable stroke, the standard SC series is a more economical choice. This cylinder is a direct replacement for another AirTAC SCJ50 cylinder with a 180mm nominal stroke and 30mm adjust range, matching PT ports and a basic mount. The built-in magnet ensures compatibility with existing sensor setups.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ50X180-30S FAQ
The theoretical push force at 0.5 MPa is 982 N, and the pull force is 825 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1767 N. Remember that the pull force is lower due to the area of the 20mm piston rod.
Yes, this is a direct replacement for any AirTAC SCJ50 adjustable-stroke cylinder with a 180mm nominal stroke and a 30mm adjustment range. Ensure your existing mounting is basic, the port thread is PT, and that you need the built-in magnet for sensors. The body length and all interface dimensions are identical.
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