Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40S 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 SAIJ80AX400-40S
The AirTAC SAIJ80X400-40-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 2513N push force at 0.5 MPa, utilizing a 25mm piston rod and G3/8 PT ports. The integrated -40 adjustment code provides a usable travel window of 360-400mm, allowing you to dial back the nominal 400mm stroke precisely during commissioning without adding external stops.
This unit includes a standard magnet (-S) for use with CMSE reed and DMSE electronic sensors, which seat neatly into the dual-side extruded aluminum barrel grooves. The SUS420J2 stainless steel rod (material code A) offers enhanced corrosion resistance, while the variable air cushions at both ends work alongside the rear stopper to decelerate the load smoothly at the travel end.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40S |
|---|---|
| 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 SAIJ80AX400-40S
| 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 SAIJ80AX400-40S Is Used
Changeover Calibration
Dial in the exact 360-400mm end-stop position during product format changes without swapping out the entire actuator assembly.
Variable End Stops
Adjust the retract distance on the fly for diverters or pushers handling varying package sizes on a high-speed line.
Machine Setup
Fine-tune tooling approach distances during initial commissioning to prevent overtravel and ensure precise mechanical contact.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX400-40S the Right Cylinder?
Choose this 80mm bore when an application requires higher thrust than a 63mm bore (which provides 1559N push at 0.5 MPa) but does not need the full 3927N force of a 100mm variant. The adjustable stroke is ideal for product-size changeovers on a packaging line, letting operators fine-tune the end-of-travel position quickly. Because the 400mm stroke is substantial, an external guide is recommended to prevent side-loading damage to the rod over long unsupported distances.
When specifying a replacement, match the 80mm bore, 400mm stroke, 40mm adjustment range, PT G3/8 port, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Remember that the rear adjuster is a travel stop, not a lock; this cylinder will not hold a load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series instead.
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 SAIJ80AX400-40S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides a push force of 2513N and a pull force of 2268N. At the maximum pressure of 1.0 MPa, it can deliver up to 513 kgf.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective travel from the nominal 400mm down to 360mm. This creates a 360-400mm adjustable window for fine-tuning end positions at commissioning, but it does not lock the load without continuous air pressure.
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