This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X275S, 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 SI80X275S
The AirTAC SI80 Standard Air Cylinder SI80X275S 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 SAI80X275S, 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 → SAI80X275S
- 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 SI80X275S
The AirTAC SI80X275S is a discontinued double-acting ISO 15552 profile cylinder featuring a 275 mm stroke and a G3/8 port. Delivering 2513 N push force at 0.5 MPa, it is replaced by the SAI80X275S. This direct upgrade shares identical ISO 15552 mounting dimensions, bore, and output force, fitting existing fixtures seamlessly.
The SAI successor introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family expands options with SAIL and BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80X275S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X275S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X275S |
| 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 SAI80X275S 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 SAI80X275S 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 SI80X275S
| 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 SI80X275S Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, utilizing the 2513 N push force to shift loaded pallets smoothly at 0.5 MPa operating pressure.
Press Ejection
Ejects formed metal components from stamping presses, relying on the adjustable 36 mm air cushions to decelerate the 25 mm rod at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X275S with the SAI80X275S
To replace the SI80X275S, order the SAI80X275S, confirming the ISO 15552 mounting interface, 80 mm bore, 275 mm stroke, G3/8 port, and M20x1.5 rod thread. Retain your existing mounting accessory (LB, FA, TC, etc.) and specify the -S magnet for position sensing. The SAI accepts current AirTAC switches, whereas the legacy SI used CS1-B/DS1-B sensors. For sizing alternatives, a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore provides 3927 N. A plain cylinder drifts on air loss; the cushion only decelerates near stroke end. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. At 275 mm stroke, guide rods are advised to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X275S
- ✓ 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 SI80X275S FAQ
Yes, the SI80X275S is discontinued. The direct replacement is the SAI80X275S. It shares the same ISO 15552 mounting interface, 80 mm bore, 275 mm stroke, output force, and G3/8 port, fitting existing fixtures directly.
The bore is 80 mm with a G3/8 air 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 SAI80X275S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X275S replacement — usually within 7-8 hours.