Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20S
The AirTAC SAIJ80X275-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N of push force at 0.5 MPa and features an extruded aluminum barrel with sensor grooves on both sides. Fitted with a carbon steel piston rod and a PT tapered port, this model includes a magnet (-S) for seamless integration with AirTAC CMSE reed and DMSE electronic solid-state sensors.
The integrated rear stopper allows you to fine-tune the effective travel, creating a usable 255-275mm adjustment window without adding external stops. This adjuster acts purely as a travel stop to set the retract end position, meaning it will not hold a load safely without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80X275-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SAIJ80X275-20S Is Used
Product Changeover
Quickly adjust the retract end-stop by up to 20mm when switching a packaging line to a different carton size, avoiding the need to physically swap cylinders.
Machine Setup
Dial in the exact 255 to 275mm travel window during commissioning to perfectly time a pressing or lifting operation without external shims.
Variable End Stops
Provide a customizable physical stop for an automated assembly station, ensuring precise positioning of heavier 80mm bore loads.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20S the Right Cylinder?
Choose this 80mm bore when an application requires more thrust than the 63mm option (which provides 1559N push at 0.5 MPa) but does not need the full 3927N output of the 100mm class. The adjustable stroke is ideal for machine setup and product changeovers, allowing operators to dial in the exact end-position at commissioning rather than swapping out a fixed-stroke SAI cylinder. When replacing an ISO 15552 cylinder, match the 80mm bore, 275mm nominal stroke, 20mm adjustment range, PT port thread, and the -S magnet requirement.
Because the 275mm stroke creates a long unsupported rod extension, an external guide should be used to prevent excessive side-loading and premature seal wear. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting the FB, CA, CB, and CR brackets found in some other lines.
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 SAIJ80X275-20S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjusting screw acts as a mechanical stopper that shortens the effective travel. For this 275mm stroke model, it provides a usable travel window of 255 to 275mm, allowing you to trim the retract position without replacing the cylinder.
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