Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-40S 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 SAIJ80AX270-40S
The AirTAC SAIJ80X270-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 40 mm. This creates a precise 230-270 mm usable stroke window, enabling exact end-position tuning at commissioning without swapping out the barrel or adding external stopper blocks. Delivering 2513 N of push force at 0.5 MPa, it fits perfectly into medium-force pneumatic setups.
This variant includes a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and carries an -S magnet for position sensing. The extruded aluminum barrel features sensor grooves on both sides, ready to accept AirTAC CMSE reed and DMSE electronic solid-state switches. It uses a G3/8 port and relies on the standard SAIJ mounting set, which includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-40S |
|---|---|
| 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 SAIJ80AX270-40S
| 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 SAIJ80AX270-40S Is Used
Machine Changeover
Dial in the exact 230-270 mm end position during product size changes without physically swapping cylinders or adding shims.
Variable End Stops
Fine-tune the retract distance on diverter arms to handle varying package widths on the fly.
Assembly Calibration
Set precise pressing depths at commissioning by adjusting the rear stopper screw up to 40 mm.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-40S the Right Cylinder?
Choose this 80 mm bore when an application requires 2513 N of push thrust at 0.5 MPa, stepping up from a 50 mm bore that provides 982 N. The 40 mm adjustment range is ideal for product changeovers on a packaging line, letting operators dial in a new retract position without replacing the cylinder. Remember that the rear adjuster is a mechanical stop, not a lock; it will not hold a load without live air pressure. For load-holding safety, consider an AirTAC SAIL or BSAI cylinder.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 270 mm nominal stroke, 40 mm adjustment, G3/8 PT tapered port, and the -S magnet. With a 270 mm stroke, the 25 mm rod and M20x1.5 thread provide excellent rigidity, but for long unsupported loads, always add an external guide rail to prevent side-load wear on the seals.
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 SAIJ80AX270-40S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach up to 4523 N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the retract stroke by up to 40 mm, giving a usable travel window of 230-270 mm. It sets the end position but does not lock or hold the load without continuous air pressure.
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