This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X40S, 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 SI80X40S
The AirTAC SI80 Standard Air Cylinder SI80X40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X40S
- 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 SI80X40S
The AirTAC SI80X40S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 40 mm stroke. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI80X40S. This direct upgrade shares identical ISO 15552 mounting dimensions, bore, stroke, force and port, fitting existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI-SKU magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. The SAI family also adds SAIL, SAIF and BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80X40S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X40S |
| Bore size | Ø80 mm |
| Stroke | 40 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 SAI80X40S 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 SAI80X40S 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 SI80X40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×40 | 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 SI80X40S Is Used
Heavy-Duty Clamping
Applies 2513 N of clamping force at 0.5 MPa to secure heavy metal castings during CNC machining operations.
Pallet Diverter
Short 40 mm stroke pushes heavy pallets onto secondary packaging lines with rapid 30-800 mm/s actuation.
Load Ejection
Ejects dense manufactured goods from press beds, utilizing the 128 kg safe vertical lift capacity.
Replacing the Airtac SI80 Standard Air Cylinder SI80X40S with the SAI80X40S
To replace the SI80X40S, order the SAI80X40S. Confirm the ISO 15552 interface, 80 mm bore, 40 mm stroke, G3/8 port (PT/G/NPT) and mounting accessory. The -S magnet enables CS1-B/DS1-B sensors (SAI uses current switches). Sizing both ways: a 63 mm bore yields 1559 N [email protected], while a 100 mm bore yields 3927 N. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Rod material options include carbon, SUS420J2 (A) or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X40S
- ✓ 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 SI80X40S FAQ
Yes, the SI80X40S is discontinued. The direct replacement is the SAI80X40S. It shares the same ISO 15552 mounting interface, 80 mm bore, 40 mm stroke, output force, G3/8 port and accessories, fitting existing fixtures perfectly.
The 80 mm bore uses a G3/8 port. Force output is 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.
Request a Quote for the SAI80X40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X40S replacement — usually within 7-8 hours.