Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-20S 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 SAIJ80AX275-20S
The AirTAC SAIJ80X275-20-S is a double-acting ISO 15552 profile cylinder with an integrated rear stroke adjuster. It provides a 255 to 275 mm usable travel window, allowing you to dial back the 275 mm nominal stroke by up to 20 mm during commissioning. Delivering 2513 N of push force at 0.5 MPa, it handles substantial workloads while maintaining a standard ISO 15552 mounting footprint.
This variant includes a -S magnet for position detection and uses a SUS420J2 stainless steel rod for enhanced corrosion resistance. The extruded aluminum barrel features sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a mechanical stop to set the retract end position, meaning it will not hold the load dynamically without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-20S |
|---|---|
| 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 SAIJ80AX275-20S
| 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 SAIJ80AX275-20S Is Used
End-Stop Calibration
Fine-tune the 255-275 mm retract position precisely during machine setup to accommodate varying product widths without external stops.
Product Changeover
Quickly adjust the effective stroke on packaging lines when switching between different material lengths, reducing downtime.
Assembly Pressing
Utilize the 2513 N push force at 0.5 MPa for pressing components, while using the rear screw to set the exact depth limit.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-20S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore (982 N push at 0.5 MPa) is insufficient, but a 100 mm bore (3927 N push) is oversized for the machine envelope. The adjustable stroke is ideal for product changeovers or fine-tuning end positions without adding external stopper blocks. To replace an ISO 15552 cylinder, match the 80 mm bore, 275 mm stroke, 20 mm adjustment, PT G3/8 port, and the -S magnet requirement.
Because the 275 mm stroke approaches the mid-range of this bore size, the 25 mm rod diameter provides good rigidity, but long unsupported loads still require an external guide to prevent side-loading damage. The mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles. For load-holding without live air, select a SAIL or BSAI variant instead of relying on the adjuster.
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 SAIJ80AX275-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw allows you to shorten the 275 mm nominal stroke by up to 20 mm, creating a usable travel window of 255 to 275 mm. This mechanical stop sets the end position but does not lock the load without live air pressure.
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