Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-50S
The AirTAC SAIJ80X400-50-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, letting you dial back the 400 mm nominal travel to anywhere in a 350-400 mm usable window. It delivers 2513 N of pull force at 0.5 MPa and up to 4523 N at 0.9 MPa, making it suited for heavy positioning tasks. The barrel is extruded aluminum with sensor grooves on both sides.
This SKU ships with a SUS420J2 stainless steel rod (code A) for corrosion resistance and uses PT tapered port threads. The integrated magnet (-S) supports electronic DMSE and reed CMSE switches. The rear adjuster acts purely as a travel stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×400 | 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 SAIJ80 Adjustable Cylinder SAIJ80AX400-50S Is Used
Machine Changeover
Dial in the exact 350-400 mm end-stop during product size changes without physically swapping cylinders or adding external mechanical stops.
Variable End-Position Tuning
Fine-tune the retract stroke by up to 50 mm at commissioning to perfect sensor flag timing and final part seating.
Heavy Assembly Lines
Leverage 4523 N of push force at 0.9 MPa to press or lift heavy fixtures while retaining the flexibility to adjust the travel limit.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-50S the Right Cylinder?
Choose this 80 mm bore when 50 mm bore thrust (982 N push at 0.5 MPa) is insufficient, but a 100 mm bore (3927 N push at 0.5 MPa) would be overkill. The 50 mm adjustment range is ideal for machine setups requiring variable end-stops during product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder. Mounting options are restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and CA styles.
Because the 400 mm stroke is long, the 25 mm rod and M20x1.5 thread still require an external guide to prevent side-loading damage. For load-holding without continuous air pressure, use an external rod lock or pilot-operated check valve, or switch to a SAIL or BSAI cylinder, as the SAIJ adjuster is not a brake.
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 SAIJ80 Adjustable Cylinder SAIJ80AX400-50S FAQ
At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.9 MPa, the push force increases to 4523 N.
The 400 mm nominal stroke can be fine-tuned backward by up to 50 mm using the rear adjuster, creating a usable travel window of 350-400 mm.
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