Airtac SCJ50 Standard Cylinder SCJ50X500-30
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X500-30 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke500 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X500-30
The SCJ50X500-30 is a double-acting, single-rod pneumatic cylinder with a 30 mm rear adjusting screw, letting you fine-tune the stroke end position in the field without swapping the unit. With a 50 mm bore and a 20 mm rod, it delivers 982 N of push force at 0.5 MPa, scaling up to 1767 N at the maximum 0.9 MPa operating pressure, making it a capable mid-range actuator for positioning tasks.
This model uses a 500 mm nominal stroke, well within the 1200 mm maximum standard stroke for the 50 mm bore. The body length A measures 194 mm, and the adjustable air cushion decelerates the piston smoothly at stroke end. The rod thread is M16x1.5 and the port size is PT1/4, providing a robust connection for standard pneumatic circuits.
Airtac SCJ50 Standard Cylinder SCJ50X500-30 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X500-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 500 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 SCJ50X500-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SCJ50X500-30 Is Used
Commissioning & Setup
The 30 mm rear screw allows engineers to precisely dial in the stroke end position during initial machine setup without fabricating custom external stops, saving hours of mechanical adjustment time.
Product Format Changeover
On packaging lines, quickly re-adjust the push stroke for different box sizes or product widths. The 500 mm nominal stroke provides ample reach, while the screw handles the fine offset for each format.
Wear Compensation
In repetitive pressing or clamping fixtures, the stroke can be incrementally extended over time to compensate for tooling or pad wear, maintaining consistent contact force without reprogramming the machine logic.
Is the Airtac SCJ50 Standard Cylinder SCJ50X500-30 the Right Cylinder?
Choose the SCJ50X500-30 when you need a half-meter stroke with the ability to dial in the exact end position during commissioning or changeovers. If your force requirement is lower, stepping down to a 40 mm bore reduces push force to 628 N at 0.5 MPa; for more power, the 63 mm bore provides 1559 N. This adjustable-stroke model is ideal where a fixed-stroke SC cylinder would require precise, permanent hard stops.
For strokes of this length, be mindful of side loading which can bend the 20 mm rod. If the load is not guided externally, consider adding a guide rail or switching to a guided cylinder to protect the rod bearings and seal. As a direct replacement, match the 50 mm bore, 500 mm nominal stroke, 30 mm adjustment range, PT1/4 ports, and basic mounting configuration.
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 SCJ50X500-30 FAQ
The push force is 982 N at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single 20 mm rod, providing 825 N at 0.5 MPa. This is identical to a fixed-stroke SC50 cylinder.
The rear cap screw shortens the stroke end by up to 30 mm from the 500 mm nominal maximum. It is a direct dimensional replacement for an SC50X500 if you need the field-adjustability feature, provided the port size (PT1/4) and mounting style match.
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