Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30S 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 SAIJ80AX270-30S
The AirTAC SAIJ80X270-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 240-270 mm usable travel window, allowing you to dial back the 270 mm nominal stroke by up to 30 mm during commissioning. Equipped with a SUS420J2 stainless steel piston rod and a PT tapered port, it delivers 2513 N of push force at 0.5 MPa.
This extruded aluminum profile barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches. The rear adjuster acts purely as a travel stop for end-position tuning, not as a lock, meaning it cannot hold a load without live air pressure. For applications requiring true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30S |
|---|---|
| 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 SAIJ80AX270-30S
| 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 SAIJ80AX270-30S Is Used
Machine Changeover
Fine-tune the 240-270 mm end-position during product size transitions on a packaging line without physically replacing the actuator.
End-Stop Tuning
Dial in the exact retract distance during initial commissioning using the rear screw, avoiding the need to bolt on external mechanical stops.
Assembly Pressing
Utilize the 2513 N push force at 0.5 MPa for pressing operations while retaining the flexibility to shorten the stroke by up to 30 mm.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30S the Right Cylinder?
Choose this 80 mm bore when you need higher thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but want to avoid the larger footprint of a 100 mm unit. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers without swapping the cylinder or adding external stops. It supports a speed range of 30-800 mm/s.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 270 mm stroke, 30 mm adjustment, PT G3/8 port, and the -S magnet. It uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, CR). Because the stroke is 270 mm, ensure adequate side-load support by using an external guide for long unsupported rod extensions.
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 SAIJ80AX270-30S FAQ
At 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from 270 mm down to 240 mm. It only sets the travel end and does not lock or hold the load without live air pressure.
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