Airtac SCJ50 Standard Cylinder SCJ50X350-30S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X350-30S 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, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke350 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X350-30S
The SCJ50X350-30S is a double-acting, single-rod pneumatic cylinder that puts stroke-end tuning directly in your hands. Its rear-cap adjusting screw provides a 30 mm field-adjustable range, letting you fine-tune the 350 mm nominal stroke for commissioning, format changes, or wear take-up without swapping the cylinder. At 0.5 MPa, it delivers 982 N of push force and 825 N on the pull stroke, driven through a 20 mm diameter piston rod.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The cylinder uses a PT1/4 port, an M16x1.5 rod thread, and a 21 mm air cushion to decelerate the piston quietly. The body length A for this SCJ configuration is 194 mm, making it a compact yet powerful solution for mid-range automation tasks requiring on-the-fly adjustability.
Airtac SCJ50 Standard Cylinder SCJ50X350-30S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X350-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 350 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 SCJ50X350-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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 SCJ50X350-30S Is Used
Commissioning & Trial Runs
During machine setup, the 30 mm adjusting screw allows engineers to dial in the exact end-stop position iteratively without depressurizing the system or fabricating mechanical shims, accelerating the commissioning process.
Wear Compensation in Clamping
In high-cycle clamping or pressing operations, the adjustable stroke can be periodically shortened to compensate for wear on tooling or contact surfaces, maintaining consistent clamp force without replacing the actuator.
Multi-Format Packaging
For packaging lines that handle different product sizes, the SCJ50X350-30S allows operators to quickly adjust the pusher stroke end by up to 30 mm to accommodate a new box or case format, reducing changeover time significantly.
Is the Airtac SCJ50 Standard Cylinder SCJ50X350-30S the Right Cylinder?
Choose the SCJ50X350-30S when your application demands a 350 mm stroke with the flexibility to trim the end position by up to 30 mm. If your force requirements are lower, stepping down to a 40 mm bore reduces push force to 628 N at 0.5 MPa, while moving up to a 63 mm bore increases it substantially to 1559 N. For applications where the stroke length is fixed and will never need adjustment, the standard SC50X350 fixed-stroke cylinder is a more economical alternative.
This is a direct replacement for any AirTAC SCJ50X350-30S cylinder with a PT port and built-in magnet. With a 350 mm stroke, be mindful of side-loading on the 20 mm rod; if the load is not guided externally, consider adding an external guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear. The basic mounting style means you will need to order the appropriate mounting accessory separately, such as an FA front flange (F-SC50FA) or LB foot mount (F-SC50LB).
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 SCJ50X350-30S FAQ
The theoretical push force at 0.5 MPa is 982 N, and the pull force is 825 N due to the 20 mm rod reducing the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the push force reaches 1964 N. These forces are identical to a standard SC50 fixed-stroke cylinder.
Yes, this is a direct, form-fit-function replacement for any AirTAC SCJ50X350-30S cylinder with a PT port and magnet. Ensure the replacement unit matches the original's 50 mm bore, 350 mm nominal stroke, 30 mm adjustment range, and PT thread to guarantee identical mounting and performance.
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