Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 270mm 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
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50S
The AirTAC SAIJ80X270-50-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the effective travel down from 270 mm to a minimum of 220 mm. This 50 mm adjustment window is ideal for dialing in exact end positions during machine commissioning or product changeovers without swapping out the physical actuator. It delivers a robust 2513 N of thrust at 0.5 MPa, making it well-suited for heavy handling tasks.
Built with a SUS420J2 stainless steel rod (material code A) and PT tapered port threads, this unit includes a magnet for position sensing. The standard extruded aluminum barrel features sensor grooves on both sides, seamlessly accepting AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAIJ80AX270-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SAIJ80AX270-50S Is Used
Product Changeover Lines
Leverage the 50 mm adjustment range to quickly adapt the stroke from 270 mm down to 220 mm when switching to different package sizes on a packaging conveyor.
Machine Setup Commissioning
Fine-tune the exact end-of-stroke position during initial equipment setup, preventing the need to physically swap cylinders or bolt on external mechanical stops.
Heavy Material Handling
Utilize the 2513 N thrust at 0.5 MPa to push heavy pallets or workpieces, relying on the 25 mm rod to handle higher side loads during transit.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50S the Right Cylinder?
Select this 80 mm bore actuator when your application requires substantial force—stepping down to a 63 mm bore reduces thrust to 1559 N at 0.5 MPa, which may be insufficient for heavier payloads. Conversely, moving up to a 100 mm bore yields 3927 N if your system demands even greater power. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops to accommodate multiple product sizes on a single line.
For load-holding without continuous air pressure, note that this cylinder's adjuster and air cushions function only as travel stops, not brakes; you would need to specify an SAIL pneumatic lock or an external pilot-operated check valve. Because the 270 mm stroke exceeds 300 mm is false here, but with a 25 mm rod and substantial travel, long unsupported loads still require an external guide to prevent side-loading damage. This model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and 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 SAIJ80AX270-50S FAQ
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke by up to 50 mm. This creates a usable travel window of 220 to 270 mm, letting you fine-tune the retract position without replacing the cylinder. It functions as a travel stop, not a lock, and cannot hold the load without live air pressure.
At an operating pressure of 0.5 MPa, the SAIJ80X270-50-S provides 2513 N of push force and 2268 N of pull force. The standard speed range for this bore size is 30-800 mm/s, supported by a G3/8 port.
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