Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 115mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke115 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20
The AirTAC SAIJ50X115-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 115 mm travel back by up to 20 mm. This yields a highly useful 95-115 mm usable window, allowing precise end-position tuning at commissioning without swapping the cylinder or adding external stops. It delivers 982 N of push thrust at 0.5 MPa, making it a robust choice for mid-range force tasks.
Built with a SUS420J2 stainless steel rod for enhanced corrosion resistance, this model uses PT tapered port threads and lacks a piston magnet. The extruded aluminum barrel incorporates sensor grooves on both sides for future retrofits. Remember that the rear adjuster functions purely as a travel stop to decelerate the load, not as a lock; maintaining position requires live air or a dedicated SAIL lock cylinder.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 115 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×115 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20 Is Used
End-Position Tuning
Dial in the exact retract distance within the 95-115 mm window during machine commissioning to perfect part seating without hardware changes.
Product Changeover
Quickly adapt the cylinder's effective stroke on the fly when switching the production line to a different sized package or component.
Variable Assembly Stops
Use the rear stopper to set precise physical limits for pressing or locating operations that require slight travel adjustments.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20 the Right Cylinder?
Select this 50 mm bore when your application requires the 982 N push force at 0.5 MPa, stepping up from the 40 mm bore (628 N) or down from the 63 mm bore (1559 N). The adjustable 95-115 mm travel window is ideal for machine setups requiring variable end-stops during product changeovers. Unlike a fixed-stroke SAI cylinder, this model allows you to dial in the exact retract position on the fly.
When integrating this cylinder, ensure your ISO 15552 replacement matches the 50 mm bore, 115 mm stroke, 20 mm adjustment, PT port threads, and the specific mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is under 300 mm, side-load risks are moderate, but the 20 mm rod thread and 16 mm rod diameter handle standard loads effectively. For any load-holding requirements without continuous air pressure, specify an external rod lock or pilot-operated check valve, as the adjuster cannot hold the load.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX115-20 FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push thrust and 825 N of pull thrust. It operates at speeds between 30 and 800 mm/s.
The rear adjuster acts as a stop that shortens the nominal 115 mm stroke by up to 20 mm, giving you a usable travel window of 95-115 mm to fine-tune the end position without replacing the cylinder.
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