This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X270, 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 SI80X270
The AirTAC SI80 Standard Air Cylinder SI80X270 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X270, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X270
- 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 SI80X270
The AirTAC SI80X270 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 270 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The current-production direct replacement is the SAI80X270, which matches the original bore, stroke, force, port, and ISO 15552 mounting interface exactly.
The SAI upgrade features a revised piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. For load-holding, note that a standard cylinder drifts without live air; the cushion only decelerates. Use the SAIL or BSAI lock variants if needed.
Airtac SI80 Standard Air Cylinder SI80X270 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X270 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X270 |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAI80X270 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 SAI80X270 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 SI80X270
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SI80X270 Is Used
Pallet Diversion
Pushes heavy pallets onto secondary packaging lines using 2513 N of thrust at 0.5 MPa.
Press Ejection
Ejects formed metal components from a press bed, relying on the 36 mm adjustable cushion.
Replacing the Airtac SI80 Standard Air Cylinder SI80X270 with the SAI80X270
To replace the discontinued SI80X270, order the SAI80X270. Verify your ISO 15552 mounting fixtures (LB, FA, TC, etc.), the G3/8 port, and the 270 mm stroke. Because this SKU lacks the -S magnet, it cannot accept a sensor; if position detection is required, order an SAI80X270S and use current AirTAC switches. If sizing down, a 63 mm bore gives 1559 N push at 0.5 MPa; if sizing up, a 100 mm bore gives 3927 N. For loads needing holding on air loss, select the SAIL or BSAI lock variant instead of relying on the cushion.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X270
- ✓ 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 SI80X270 FAQ
Yes, the SI80X270 is discontinued. The direct replacement is the SAI80X270. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 80 mm bore, 270 mm stroke, output force, and G3/8 port.
The G3/8 port bore delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical max of 513 kgf at 1.0 MPa. It uses a 25 mm rod with an M20x1.5 thread.
Request a Quote for the SAI80X270
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X270 replacement — usually within 7-8 hours.