This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X70, 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 SI80X70
The AirTAC SI80 Standard Air Cylinder SI80X70 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X70, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X70
- 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 SI80X70
The AirTAC SI80X70 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 70 mm stroke, delivering 2513 N of push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI80X70, a direct replacement retaining the exact ISO 15552 mounting interface, G3/8 port size, and M20x1.5 rod thread.
The SAI80X70 features an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding on air loss, the new SAI family offers the SAIL and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X70 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X70 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X70 |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAI80X70 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 SAI80X70 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 SI80X70
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SI80X70 Is Used
Press Fit Assembly
Drives bearings or pins into housings on an automated line, utilizing the 2513 N push force at 0.5 MPa to seat components reliably.
Pallet Diverting
Actuates a diverting gate or stopper block on a heavy-duty material handling conveyor, providing robust resistance against impacting loads.
Carton Flap Folding
Folds heavy corrugated carton flaps prior to sealing in a packaging line, where the 70 mm stroke and 80 mm bore provide fast, decisive motion.
Replacing the Airtac SI80 Standard Air Cylinder SI80X70 with the SAI80X70
To replace the discontinued SI80X70, order the SAI80X70 ensuring the ISO 15552 mounting interface, 80 mm bore, 70 mm stroke, and G3/8 port match your existing fixture. Because this specific SKU lacks the -S magnet suffix, it cannot accept a position sensor; if switching is required, select an SAI80X70S and use current AirTAC switches instead of the legacy CS1-B/DS1-B. If you need to size up or down, neighboring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). Note that a standard cylinder drifts when air is lost, as the adjustable 36 mm cushion only decelerates the piston near stroke end; for secure load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X70
- ✓ 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 SI80X70 FAQ
Yes, the SI80X70 is discontinued. The direct replacement is the AirTAC SAI80X70. It is dimensionally interchangeable per ISO 15552, offering the same 80 mm bore, 70 mm stroke, output force, G3/8 port, and mounting accessories.
The 80 mm bore features 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 the push force is 3518 N, and the theoretical maximum force is 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X70
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X70 replacement — usually within 7-8 hours.