Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40S 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 SAIJ80X275-40S
The AirTAC SAIJ80X275-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 235-275 mm usable travel window. It delivers 2513 N of pull force at 0.5 MPa and utilizes a robust 25 mm carbon steel rod with M20x1.5 threading. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
Equipped with a magnet for position sensing, this unit supports AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts strictly as a travel stop to fine-tune the retract end at commissioning, but it does not lock or hold the load without live air pressure. It uses a PT tapered G3/8 port and offers adjustable air cushions at both ends to manage deceleration.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40S |
|---|---|
| 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 SAIJ80X275-40S
| 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 SAIJ80X275-40S Is Used
Product Changeover
Dial in the 235-275 mm travel window during line changeovers to accommodate different package lengths without swapping out the entire cylinder assembly.
End-Stop Calibration
Fine-tune the retract position during machine commissioning to achieve precise alignment, using the rear screw to set the exact 40 mm trim back from the 275 mm nominal stroke.
Variable Diverter Stroke
Adjust the retract distance on the fly for sorting diverters that must handle varying product sizes on a single conveyor belt line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-40S the Right Cylinder?
Choose this adjustable-stroke model over a fixed SAI cylinder when your machine setup requires variable end-stops for product changeovers or precise end-position tuning without adding external physical stops. If your application demands higher thrust, stepping up to the 100 mm bore yields 3927 N at 0.5 MPa, while dropping to a 63 mm bore reduces the pull force to 1402 N.
Because this unit has a 275 mm stroke, the unsupported load should be guided externally to prevent side-loading damage to the rod and front cap. For true load-holding without continuous air pressure, pair the cylinder with an external pilot-operated check valve or select the AirTAC SAIL or BSAI locking variants. This SAIJ configuration uses a PT port thread, carbon steel rod, and a reduced mounting set of 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 SAIJ80X275-40S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force due to the single rod. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw lets you shorten the 275 mm nominal stroke by up to 40 mm, creating a 235-275 mm usable travel window. The adjuster acts as a mechanical stop for end-position tuning and does not function as a lock to hold the load without live air.
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