Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40S 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 SAIJ80AX275-40S
The AirTAC SAIJ80X275-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 2513N of push force at 0.5 MPa and features a 25mm SUS420J2 stainless steel rod. With a nominal stroke of 275mm and a 40mm adjustment range, you can dial back the effective travel to anywhere within a 235-275mm window during commissioning without swapping hardware.
This adjustable-stroke model includes a magnetic piston (-S) for position sensing and uses PT tapered port threads with a G3/8 connection. The extruded aluminum barrel incorporates sensor grooves on both sides, compatible with AirTAC CMSE reed and DMSE electronic solid-state switches. The rear stopper sets the retract end position, but remember it acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40S |
|---|---|
| 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 SAIJ80AX275-40S
| 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 SAIJ80AX275-40S Is Used
Product Changeover
Quickly fine-tune the 235-275mm travel window during line changeovers to accommodate different product sizes without physically replacing the cylinder.
End-Stop Calibration
Dial in the exact retract position during machine commissioning using the rear adjuster, eliminating the need to machine custom external stopper blocks.
Variable Positioning
Actuate diverter gates or pushers on a conveyor where the required extension distance occasionally shifts by up to 40mm between production runs.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40S the Right Cylinder?
Select this 80mm bore cylinder when an application requires precise end-position tuning or frequent product changeovers, replacing the need for fixed-stroke SAI cylinders and external stops. If the 2513N push force at 0.5 MPa is excessive, step down to a 63mm bore (1559N); if you need more power, a 100mm bore provides 3927N. Since the 275mm stroke exceeds 300mm, ensure an external guide supports the load to prevent excessive side-loading on the rod.
For an exact ISO 15552 replacement, match the 80mm bore, 275mm stroke, 40mm adjustment, PT G3/8 port, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that this mounting set omits FB, CA, CB, and CR brackets. For load-holding without live air, integrate an external rod lock or choose SAIL or BSAI cylinders.
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 SAIJ80AX275-40S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster acts as a mechanical stop that lets you shorten the 275mm nominal stroke by up to 40mm, creating a usable travel window of 235-275mm. It sets the end position but does not lock the load without continuous air pressure.
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