This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X165S, 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 SI80X165S
The AirTAC SI80 Standard Air Cylinder SI80X165S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 165mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X165S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke165 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X165S
- 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 SI80X165S
The AirTAC SI80X165S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80X165S. This current-production direct maintains the exact 80mm bore, 165mm stroke, M20x1.5 rod thread, and ISO 15552 mounting interface, dropping directly into existing fixtures without mechanical changes.
The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for lower start-up pressure and extended life. The SI-S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family introduces lock and valve variants like SAIL and BSAI that the original SI line lacked.
Airtac SI80 Standard Air Cylinder SI80X165S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X165S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X165S |
| Bore size | Ø80 mm |
| Stroke | 165 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 SAI80X165S 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 SAI80X165S 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 SI80X165S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×165 | 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 SI80X165S Is Used
Pallet Diversion
Actuates heavy divert arms on packaging lines, using the 2513 N push force to redirect loaded pallets reliably at 0.5 MPa.
Press Clamping
Secures heavy steel blanks in machining centers, providing stable holding via the 36mm adjustable cushions at stroke ends.
Vertical Lift Gate
Raises and lowers 128 kg material handling gates using 0.5 MPa shop air, relying on the -S magnet for position feedback.
Replacing the Airtac SI80 Standard Air Cylinder SI80X165S with the SAI80X165S
To replace the SI80X165S, order the SAI80X165S and verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), G3/8 port thread (PT/G/NPT), and the -S magnet requirement. The SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B set. For sizing, the 80mm bore yields 2513 N push and 2268 N pull at 0.5 MPa; dropping to a 63mm bore reduces push to 1559 N, while increasing pressure to 0.7 MPa yields 3518 N. Remember that a standard cylinder does not hold load on air loss—the cushions only decelerate. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. At 165mm stroke, side-load and rod-bending risks are minimal, but ensure proper guide alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X165S
- ✓ 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 SI80X165S FAQ
Yes, the SI80X165S is discontinued. The direct replacement is the SAI80X165S. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 165mm stroke, G3/8 port, and mounting interface, so it fits existing fixtures perfectly.
The 80mm bore uses a G3/8 air port and a 25mm piston rod. It generates 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X165S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X165S replacement — usually within 7-8 hours.