This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX275S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI80 Standard Air Cylinder SI80AX275S
The AirTAC SI80 Standard Air Cylinder SI80AX275S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX275S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX275S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI80 Standard Air Cylinder SI80AX275S
The AirTAC SI80AX275S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel. It delivers 2513 N push force at 0.5 MPa through its 80 mm bore and G3/8 port. The direct replacement is the SAI80AX275S, which matches the original stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI80AX275S features the SUS420J2 stainless steel rod option and a piston magnet for CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80AX275S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX275S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX275S |
| 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80AX275S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAI80AX275S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80AX275S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×275 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI80 Standard Air Cylinder SI80AX275S Is Used
Mid-Tonnage Pressing
Applies up to 4523 N at 0.9 MPa for seating bearings or light stamping tasks in automated cells.
Pallet Diversion
The 275 mm stroke provides the reach needed to push heavy pallets onto secondary conveyor lines.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX275S with the SAI80AX275S
To replace this SI80AX275S, order the SAI80AX275S. Verify the ISO 15552 mounting interface, 275 mm stroke, G3/8 port, and the -S magnet for position sensing. The SAI family adds SAIL, SAIF, and BSAI lock or valve variants the SI lacked. For sizing alternatives, a 63 mm bore gives 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. Because this is a 275 mm stroke, ensure adequate guiding to prevent rod bending under side loads. A plain cylinder drifts on air loss; use a pilot check valve or SAIL/BSAI lock for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX275S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80AX275S FAQ
Yes, the SI80AX275S is discontinued. The direct replacement is the SAI80AX275S. It features the same ISO 15552 mounting interface, 80 mm bore, 275 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
It uses a G3/8 port. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX275S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX275S replacement — usually within 7-8 hours.