This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X350S, 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 SI80X350S
The AirTAC SI80 Standard Air Cylinder SI80X350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X350S
- 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 SI80X350S
The AirTAC SI80X350S is a discontinued double-acting ISO 15552 profile cylinder featuring a 350 mm stroke and an extruded aluminium barrel. Delivering a push force of 2513 N at 0.5 MPa, it is replaced direct by the SAI80X350S. This successor shares the same G3/8 port, M20x1.5 rod thread, and ISO 15552 mounting interface, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL and BSAI lock variants the SI lacked. Your -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X350S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X350S |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAI80X350S 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 SAI80X350S 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 SI80X350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×350 | 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 SI80X350S Is Used
Pallet Diversion
Pushes heavy pallets laterally across transfer lines using the 2513 N thrust class, with the 350 mm stroke clearing wide loads.
Press Ejection
Ejects formed parts from machinery, relying on the adjustable 36 mm air cushions to decelerate the rod smoothly at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X350S with the SAI80X350S
To replace the SI80X350S, order the SAI80X350S, verifying the ISO 15552 mounting interface, 80 mm bore, 350 mm stroke, G3/8 port, and your specific mounting accessory. The -S magnet means it accepts CS1-B/DS1-B switches, though the SAI replacement uses current AirTAC sensors. If sizing alternatives, neighbouring bores (63 mm or 100 mm) change the 0.5 MPa push force (1559 N or 3927 N). Note that a plain cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 350 mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X350S
- ✓ 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 SI80X350S FAQ
Yes, the SI80X350S is discontinued. The direct replacement is the SAI80X350S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 350 mm stroke, output force, G3/8 port, and mounting interface.
This double-acting cylinder has a G3/8 air port. It delivers a push force of 2513 N and a pull force of 2268 N at 0.5 MPa. At 0.7 MPa push is 3518 N, at 0.9 MPa push is 4523 N, and the theoretical maximum is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X350S replacement — usually within 7-8 hours.