Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30S 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 SAIJ80AX275-30S
The AirTAC SAIJ80X275-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 245-275 mm usable travel window, allowing you to dial back the 275 mm nominal stroke by up to 30 mm during commissioning without adding external stops. In the 80 mm bore class, it delivers a robust 3518 N push force at 0.7 MPa, making it highly capable for variable end-position tuning on heavy machinery.
This variant features an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and the rear adjuster acts purely as a travel stop to set deceleration endpoints, not as a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30S |
|---|---|
| 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 SAIJ80AX275-30S
| 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 SAIJ80AX275-30S Is Used
Machine Changeover Setup
Dial in the exact 245-275 mm end-stop during product size transitions on a packaging line, eliminating the need to swap cylinders or reposition hard stops.
Variable End-Position Tuning
Fine-tune the retract stroke by up to 30 mm during commissioning to perfect the seating pressure of heavy forming tools without disassembling the fixture.
Heavy-Duty Assembly Stations
Leverage the 3518 N push force at 0.7 MPa to drive heavy actuators, using the rear screw to sync multiple cylinders on automated assembly machinery.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-30S the Right Cylinder?
Choose this 80 mm bore adjustable-stroke cylinder when your application requires precise end-position tuning during machine setup or product changeovers, stepping up from a 63 mm bore that provides 2182 N push force at 0.5 MPa. The adjustable rear stopper allows rapid fine-tuning of the 245-275 mm travel window without swapping out the cylinder, which is far more efficient than machining custom spacers for a fixed-stroke SAI model. Because the nominal stroke is 275 mm, an external guide is recommended to manage side loads and prevent rod bending over the extended travel distance. For load-holding without live air pressure, the rear adjuster and air cushions will not hold the load; you should specify an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock instead. This SAIJ model uses a PT tapered G3/8 port and supports the reduced SAIJ mounting set: 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 SAIJ80AX275-30S FAQ
The 80 mm bore generates a push force of 3518 N and a pull force of 2268 N at 0.7 MPa. At the maximum operating pressure of 1.0 MPa, it provides up to 513 kgf of push force.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 275 mm nominal stroke by up to 30 mm, creating a 245-275 mm usable travel window. It only sets the travel end and does not lock or hold the load without live air pressure.
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