Airtac SCJ50 Standard Cylinder SCJ50X500-50
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X500-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 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-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X500-50
The SCJ50X500-50 is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a nominal stroke of 500 mm. A rear-cap adjusting screw provides a 50 mm field-adjustable range, letting you fine-tune the stroke end position without removing the cylinder. At 0.5 MPa, it delivers 982 N of push force and 825 N on the pull stroke, driven by a 20 mm diameter piston rod.
This tie-rod cylinder uses PT1/4 ports and an M16x1.5 rod thread, with a 21 mm air cushion at each end for controlled deceleration. The SCJ body length A is 194 mm, making it slightly longer than a fixed-stroke SC of the same bore. It operates from 0.15 to 1.0 MPa and handles speeds of 30-800 mm/s, suiting applications where the end position must be dialled in during commissioning or after wear.
Airtac SCJ50 Standard Cylinder SCJ50X500-50 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X500-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 50 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 SCJ50X500-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ50X500-50 Is Used
Commissioning & Fine-Tuning
Dial in the exact stroke end during machine setup. The 50 mm rear screw adjustment lets technicians set the final position without swapping cylinders or machining external hard stops.
Format Changeovers
On packaging or assembly lines running multiple product sizes, the adjustable stroke allows operators to quickly reset the cylinder's end position for a new format, reducing downtime between batches.
Wear Compensation
In clamping or pressing operations, the stroke can be extended slightly over time to compensate for tooling or pad wear, maintaining consistent contact force without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X500-50 the Right Cylinder?
Choose the SCJ50X500-50 when you need to adjust the stroke end by up to 50 mm on the machine. If 982 N of push force at 0.5 MPa is insufficient, stepping up to the 63 mm bore provides 1559 N. For a lower force class, the 40 mm bore delivers 628 N. A fixed-stroke SC cylinder is a better fit when the stroke never needs field adjustment, while a guided cylinder should be used if the 500 mm stroke creates side-loading that could bend the 20 mm rod.
For direct replacement, match the 50 mm bore, 500 mm nominal stroke, 50 mm adjust range, PT1/4 ports, and basic mounting. If you need piston position sensing, order the -S magnet variant and add CMSG or DMSG sensors. This model uses the standard TPU seal and PT threads.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ50X500-50 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N. The theoretical force at 1.0 MPa is 200 kgf.
A rear-cap screw sets the stroke end position within a 50 mm range, shortening the nominal 500 mm stroke. Pick the SCJ when you need to fine-tune the end position on the machine for commissioning, changeovers, or wear take-up. Choose a fixed-stroke SC if the stroke length is permanent and never needs field adjustment.
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