Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20 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 SAIJ80X275-20
The AirTAC SAIJ80X275-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel within a 255-275 mm window. Delivering a substantial 4523N of push force at 0.9 MPa, it handles heavy displacement tasks with precision. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
This model uses a 25 mm carbon steel rod with an M20x1.5 thread, providing robust resistance to side loads, though a 275 mm stroke still warrants an external guide for optimal stability. It features PT tapered G3/8 ports and variable air cushions at both ends. The rear stopper mechanism allows for fine end-position tuning during commissioning without swapping the cylinder.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20 |
|---|---|
| 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 SAIJ80X275-20
| 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 SAIJ80X275-20 Is Used
Machine Changeover
Dial in the 255-275 mm travel window during product size transitions to set new end positions rapidly without changing the cylinder.
End-Stop Tuning
Fine-tune the exact retraction point at commissioning using the rear screw, avoiding the need for external mechanical stops.
Variable Diverter
Adjust the stroke on the fly to accommodate different package sizes on a sorting line, ensuring precise physical contact.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-20 the Right Cylinder?
Choose this adjustable-stroke model over a fixed SAI cylinder when your application requires variable end stops or precise product changeovers without adding external stops. If you need less force, stepping down to a 63 mm bore yields 2805N at 0.9 MPa, while stepping up to a 100 mm bore provides 7068N for heavier loads. To replace an ISO 15552 cylinder, match the 80 mm bore, 275 mm stroke, 20 mm adjustment, PT G3/8 port, and mounting interface. Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For load-holding without pressure, consider the SAIL or BSAI series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80X275-20 FAQ
At 0.9 MPa operating pressure, this 80 mm bore cylinder provides a push force of 4523N and a pull force of 4071N. It can deliver a maximum force of 513 kgf at 1.0 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 275 mm nominal stroke by up to 20 mm, creating a usable travel window of 255 to 275 mm. It decelerates the travel end but does not lock the load without live air pressure.
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