Airtac SCJ50 Standard Cylinder SCJ50X175-50FA
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X175-50FA 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, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke175 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X175-50FA
The SCJ50X175-50FA is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a nominal 175 mm stroke, equipped with a rear adjusting screw that provides a 50 mm field-adjustable range. This allows the stroke end position to be fine-tuned without removing the cylinder, delivering 982 N of push force and 825 N of pull force at 0.5 MPa. The 20 mm diameter piston rod and PT1/4 port ensure a robust connection for medium-duty linear tasks.
This model includes an FA front rectangular flange (F-SC50FA) for secure panel or end-face mounting. The body length A(SCJ) is 194 mm, and the integrated air cushion (21 mm length) decelerates the piston smoothly at stroke end. Operating on filtered air from 0.15 to 1.0 MPa, it is built for commissioning adjustments, format changeovers, or any application where the end stop needs periodic repositioning.
Airtac SCJ50 Standard Cylinder SCJ50X175-50FA Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X175-50FA |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 175 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 SCJ50X175-50FA
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×175 | 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 SCJ50X175-50FA Is Used
Commissioning & Setup
The 50 mm adjust range lets technicians dial in the exact stroke end position during machine commissioning without swapping cylinders or fabricating custom stops, speeding up the initial build and debugging phase.
Product Format Changeover
On packaging or assembly lines running multiple product sizes, operators can quickly adjust the cylinder's end stop to match a new box height or component thickness, minimizing changeover downtime.
Wear Compensation
In clamping or pressing fixtures where tooling or contact surfaces wear over time, the rear screw can be advanced to take up the resulting slack, maintaining consistent clamping force without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X175-50FA the Right Cylinder?
Choose the SCJ50X175-50FA when you need a 50 mm bore cylinder that lets you dial in the stroke end across a 50 mm window on the machine. If your force requirement is lower, stepping down to the 40 mm bore (628 N push at 0.5 MPa) may reduce energy use; for higher force, the 63 mm bore delivers 1559 N push at the same pressure. This adjustable-stroke unit is the right pick when the exact end position is not known at design time or must change between batches. For a fixed, repeatable stroke, the standard SC series is a simpler alternative.
A direct replacement must match the 50 mm bore, 175 mm nominal stroke, 50 mm adjust range, PT port thread, and FA front flange mounting. For strokes of this length, ensure the rod is not subjected to high side loads; if lateral forces are present, pair the cylinder with an external guide rail or consider a guided cylinder to prevent rod bending and seal wear.
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 SCJ50X175-50FA FAQ
At the standard operating pressure of 0.5 MPa, this cylinder produces 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
Yes, if you need the ability to fine-tune the stroke end. The SCJ50X175-50FA has the same 50 mm bore and 175 mm maximum stroke as an SC50X175, but adds a 50 mm rear adjustment range. Ensure your mounting matches the FA front flange pattern and that the slightly longer body length A(SCJ) of 194 mm fits your machine envelope.
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