Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50 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 SAIJ80AX270-50
The AirTAC SAIJ80X270-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window between 220 and 270 mm. It delivers a robust 4523 N of push force at 0.9 MPa, making it well-suited for heavy manipulation tasks. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback integration.
This SKU features a SUS420J2 stainless steel rod (material code A) paired with PT tapered port threads (G3/8). The 25 mm rod diameter and M20x1.5 rod thread provide substantial rigidity, but because the 270 mm stroke is 300 mm or under, side-load risks are moderate. However, for any heavy off-center loads, an external guide remains advisable to prevent premature seal wear.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50 |
|---|---|
| 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 SAIJ80AX270-50
| 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 SAIJ80AX270-50 Is Used
Machine Setup Changeover
Dial in the exact 220 to 270 mm stroke during product line changeovers to accommodate different part sizes without physically replacing the actuator.
Variable End-Stop Positioning
Use the 50 mm rear adjuster to fine-tune the retract end-position on the fly, ensuring precise alignment for varying assembly tooling heights.
Heavy Material Handling
Leverage the 4523 N push force at 0.9 MPa to move heavy pallets or chassis components, relying on the adjustable stop to tweak the final resting position.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-50 the Right Cylinder?
Choose this 80 mm bore when an application requires more force than a 63 mm cylinder (which provides 2805 N push at 0.9 MPa) but less bulk than a 100 mm bore. The 50 mm rear adjustment screw is selected over a fixed-stroke SAI when you need precise end-position tuning at commissioning or during product changeovers without swapping out the physical cylinder. It supports mounting options Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Remember that the rear adjuster functions strictly as a travel stop, not a lock; it cannot hold a load safely without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series. This model uses PT port threads and lacks a standard magnet, so it does not support CMSE or DMSE sensors without modification.
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 SAIJ80AX270-50 FAQ
At an operating pressure of 0.9 MPa, this 80 mm bore cylinder generates 4523 N of push force and 4071 N of pull force. It can safely operate up to a maximum pressure of 1.0 MPa.
The rear adjuster acts as an external stop that lets you shorten the nominal 270 mm stroke by up to 50 mm, creating a usable travel window of 220 to 270 mm. It is a travel stop, not a lock, meaning it will not hold the load without continuous live air pressure.
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