This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X280S, 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 SI80X280S
The AirTAC SI80 Standard Air Cylinder SI80X280S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X280S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X280S
- 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 SI80X280S
The AirTAC SI80X280S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel. Delivering 2513 N push force at 0.5 MPa through an 80 mm bore and 280 mm stroke, it is replaced by the SAI80X280S. This direct upgrade shares the exact same mounting interface, G3/8 port, and M20x1.5 rod thread.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X280S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X280S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X280S |
| Bore size | Ø80 mm |
| Stroke | 280 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 SAI80X280S 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 SAI80X280S 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 SI80X280S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×280 | 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 SI80X280S Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, using the 2513 N thrust to push loaded pallets smoothly onto secondary conveyors.
Press Clamping
Secures heavy steel workpieces in machining fixtures, relying on adjustable 36 mm air cushions to decelerate the rod at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X280S with the SAI80X280S
To replace the SI80X280S, order the SAI80X280S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and the -S magnet. If you need more force, the 100 mm bore yields 3927 N push at 0.5 MPa; if less is acceptable, the 63 mm bore provides 1559 N. For this 280 mm stroke, use a guide to prevent rod bending under side loads. A plain cylinder drifts without air and the cushion only decelerates; for load holding, specify the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X280S
- ✓ 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 SI80X280S FAQ
Yes, the SI80X280S is discontinued. The direct replacement is the SAI80X280S. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 280 mm stroke, G3/8 port, and mounting interface.
The G3/8 port feeds a 25 mm rod. Force outputs are: 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X280S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X280S replacement — usually within 7-8 hours.