Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 225mm 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
- Stroke225 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 SAIJ50AX225-40S
The AirTAC SAIJ50X225-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 185-225 mm usable travel window. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it well-suited for mid-range actuation tasks. The extruded aluminum barrel includes sensor grooves on both sides, and this -S variant includes a magnet for position detection.
This unit is configured with a SUS420J2 stainless steel rod for enhanced corrosion resistance and PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the end position during commissioning. It does not hold the load without live air pressure; for load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 225 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 SAIJ50AX225-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | 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 SAIJ50AX225-40S Is Used
Machine Changeover
Dial in the 185-225 mm travel window during product-size changeovers without disassembling the actuator or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract stroke end during commissioning to perfect seating pressure against a workpiece or mechanical stop.
Variable Stops
Accommodate multiple package sizes on a single conveyor line by adjusting the rear screw up to 40 mm between cycles.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-40S the Right Cylinder?
Choose this 50 mm bore when 40 mm bore units (providing 628 N push at 0.5 MPa) lack the necessary thrust, but a 63 mm bore (1559 N push) would be excessive. The 40 mm adjustment range is ideal for machines requiring product-size changeovers, allowing you to dial in the exact end-stop without swapping the cylinder or adding external stops. Unlike a fixed-stroke SAI cylinder, this model accommodates variable end positions on the fly.
To replace this cylinder, match the 50 mm bore, 225 mm stroke, 40 mm adjustment, PT ports, and -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 225 mm stroke is moderately long, ensure external guidance is used if the application subjects the 20 mm rod to heavy side loads. This unit operates at speeds of 30-800 mm/s.
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 SAIJ50AX225-40S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 200 kgf.
The rear adjuster screw allows you to shorten the effective travel from the 225 mm nominal stroke down to 185 mm. This creates a 185-225 mm usable window for fine-tuning the end position without replacing the cylinder.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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