Airtac SCJ50 Standard Cylinder SCJ50X50-30SH
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30SH 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, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-30SH
The SCJ50X50-30SH is a 50 mm bore, double-acting, single-rod pneumatic cylinder with a 50 mm nominal stroke and a 30 mm rear adjusting screw. This configuration delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a strong mid-range actuator. The built-in magnet (S) enables direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection, while the Viton (H) seals extend the operating temperature range to 0–150 °C, suiting it for hot environments.
Unlike a fixed-stroke cylinder, the SCJ allows you to fine-tune the stroke end position in the field by up to 30 mm without dismounting the unit. This is ideal for commissioning adjustments, format changeovers, or compensating for tooling wear. The 20 mm diameter piston rod and PT1/4 port ensure a robust connection, and the adjustable air cushion decelerates the piston smoothly at the end of travel.
Airtac SCJ50 Standard Cylinder SCJ50X50-30SH Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 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 SCJ50X50-30SH
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SCJ50X50-30SH Is Used
Commissioning & Setup
Fine-tune the end-stop position during machine commissioning by up to 30 mm without swapping cylinders, saving hours of mechanical setup time on assembly lines.
Hot Environment Actuation
With Viton seals rated for 0–150 °C, this cylinder reliably operates presses, autoclave doors, or drying oven material handling where standard seals would fail.
Wear Compensation
Adjust the stroke end to compensate for gradual tooling or pad wear in clamping and pressing operations, maintaining consistent force application over time.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-30SH the Right Cylinder?
Choose this SCJ50X50-30SH when you need a field-adjustable stroke end within a 30 mm range on a 50 mm bore platform. If 982 N of push force at 0.5 MPa is insufficient, stepping up to a 63 mm bore SCJ provides 1559 N; if it is excessive, a 40 mm bore SCJ delivers 628 N. This model is a direct replacement for any AirTAC SCJ50X50-30SH with the same PT ports, basic mount, and magnet.
For applications requiring a fixed, non-adjustable stroke, the standard SC series is a more economical choice. If the load needs to be held in position when air pressure is removed, an external rod lock or pilot-operated check valve must be added, as the air cushion and adjusting screw do not provide any holding or braking function.
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 SCJ50X50-30SH FAQ
At the standard 0.5 MPa operating pressure, it generates 982 N of push force and 825 N of pull force. The maximum push force at 0.9 MPa is 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
You can, but the SCJ body is slightly longer to house the adjusting screw. It is a direct dimensional replacement only for another SCJ50X50-30SH. If you need the exact body length of a fixed-stroke SC, you must use the SC series.
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