Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 900mm 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
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-20
The AirTAC SAIJ80X900-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 2513N push force at 0.5MPa, utilizing a 25mm carbon steel rod. The integrated rear stopper screw provides a usable travel window of 880 to 900mm, allowing precise end-position tuning without swapping hardware.
Equipped with PT tapered G3/8 ports and 36mm variable air cushions at both ends, it handles dynamic loads effectively. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE solid-state switches. This configuration uses an SUS420J2 stainless steel rod for enhanced corrosion resistance in harsher environments.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAIJ80AX900-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SAIJ80AX900-20 Is Used
Machine Changeover
Dial in the 880-900mm travel window during product size transitions on a packaging line, saving time by adjusting the rear stopper instead of repositioning the entire actuator assembly.
End-Position Tuning
Fine-tune the final retract position during commissioning to perfectly align a heavy 2513N press tool without machining custom spacers.
Variable End Stops
Set precise mechanical limits for automated material handling equipment, using the rear screw to compensate for mechanical wear over time.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX900-20 the Right Cylinder?
Select this 80mm bore actuator when an application requires high thrust combined with variable end-stops, such as product-size changeovers on a line. If you need less force, stepping down to a 63mm bore yields 1559N at 0.5MPa, whereas a 100mm bore offers 3927N for heavier loads. The adjustable stroke is ideal for fine-tuning at commissioning, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder.
Because the 900mm stroke is substantial, an external guide is strongly recommended to prevent excessive side-loading on the 25mm rod. Remember that the rear adjuster is a travel stop, not a lock; a plain SAIJ will not hold its load without live air. For true load-holding without pressure, consider the SAIL or BSAI series. To replace an ISO 15552 cylinder, match the 80mm bore, 900mm stroke, 20mm adjustment, PT G3/8 port, and your required mounting from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ80AX900-20 FAQ
At 0.5MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. The maximum thrust is 513kgf at 1.0MPa.
The rear adjuster screw lets you shorten the nominal 900mm stroke by up to 20mm, creating a usable travel window of 880 to 900mm. The adjuster acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
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