Airtac SCJ50 Standard Cylinder SCJ50X50-30
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30 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, 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 SCJ50X50-30
The SCJ50X50-30 is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ adjustable-stroke series, offering a 50 mm nominal stroke with a 30 mm rear-end adjustment range. This design allows machine builders to fine-tune the stroke end position on the fly without swapping the cylinder, making it ideal for commissioning and format changeovers. Its 50 mm bore generates a substantial 982 N of push force at 0.5 MPa, driven by a rigid 20 mm diameter piston rod.
Built on a durable tie-rod construction with a 194 mm body length, this model features PT1/4 ports and an M16x1.5 rod thread for straightforward integration. The adjustable air cushion decelerates the piston smoothly, and the screw mechanism provides repeatable mechanical stroke setting. It operates on filtered air from 0.15 to 1.0 MPa across a standard temperature range of -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X50-30 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30 |
|---|---|
| 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 SCJ50X50-30
| 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 SCJ50X50-30 Is Used
Commissioning & Setup
Fine-tune the actuator end-stop during machine commissioning without removing the cylinder, saving hours of mechanical rework when dialing in sensor positions and part stops.
Wear Compensation
Adjust the stroke end to take up mechanical play or tooling wear over time in clamping and pressing fixtures, maintaining consistent contact force without reprogramming.
Format Changeover
Quickly adapt the stroke for different product sizes on packaging or sorting lines by turning the rear screw, eliminating the need to stock multiple fixed-stroke cylinders.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-30 the Right Cylinder?
Choose the SCJ50X50-30 when you need a mid-range force actuator with the flexibility to dial in the exact stroke end during setup. If your application requires less force, stepping down to a 40 mm bore reduces push force to 628 N at 0.5 MPa; for higher demands, the 63 mm bore delivers 1559 N. This adjustable-stroke model is the right pick over a fixed-stroke SC when the final stroke length is uncertain or may need periodic tweaking to compensate for wear. A direct replacement must match the 50 mm bore, 50 mm nominal stroke, 30 mm adjustment range, PT port thread, 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 SCJ50X50-30 FAQ
At 0.5 MPa, the cylinder provides 982 N of push force and 825 N of pull force. The maximum operating push force at 0.9 MPa is 1767 N. The pull force is lower due to the area of the 20 mm rod.
A screw in the rear cap limits the piston's return stroke end. By turning the screw, you can shorten the effective stroke by up to 30 mm from the 50 mm nominal maximum, allowing precise mechanical adjustment of the end position.
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