Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-30S 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 SAIJ80X275-30S
The AirTAC SAIJ80X275-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 3518N push force at 0.7 MPa and provides a usable travel window of 245 to 275 mm, letting you dial back the nominal stroke by up to 30 mm. The PT tapered ports and integrated magnet for CMSE or DMSE sensors make it highly adaptable for precise automation.
This model uses a 25 mm carbon steel rod with an M20x1.5 thread, offering strong resistance to side loads, though the 275 mm length still benefits from an external guide. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-30S |
|---|---|
| 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 SAIJ80X275-30S
| 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 SAIJ80X275-30S Is Used
Product Changeovers
Dial in the exact end position from 245 to 275 mm during format changes without adding external stopper blocks to the machine frame.
Commissioning Fine-Tune
Trim the retract position by up to 30 mm on-site to perfectly align tooling, absorbing minor mechanical setup variations.
Variable End Stops
Adjust the travel end on packaging lines to handle different carton sizes using the rear stopper screw while maintaining 3518N push force.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-30S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore falls short on thrust, delivering 1374N at 0.5 MPa compared to the 80 mm bore's 2513N at the same pressure. The adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for product changeovers without swapping hardware. Because the stroke is 275 mm, always use an external guide to prevent rod sag and side-load damage.
For an exact ISO 15552 replacement, match the 80 mm bore, 275 mm stroke, 30 mm adjustment, PT ports, and the -S magnet. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true fail-safe holding, consider the SAIL or BSAI series instead.
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 SAIJ80X275-30S FAQ
At an operating pressure of 0.7 MPa, this 80 mm bore cylinder provides a push force of 3518N and a pull force of 2268N. It can deliver up to 4523N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 275 mm down to 245 mm. This creates a 30 mm tuning window for end-position setup, but it does not lock the load without live air pressure.
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