This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX155S, 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 SI80AX155S
The AirTAC SI80 Standard Air Cylinder SI80AX155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 155mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX155S
- 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 SI80AX155S
The AirTAC SI80AX155S is a discontinued double-acting ISO 15552 profile cylinder with a 155 mm stroke. It features a SUS420J2 stainless steel piston rod and a built-in magnet for CS1-B/DS1-B switches. Delivering 2513 N of push force at 0.5 MPa through a G3/8 port, its direct replacement is the SAI80AX155S, which shares the exact same interface, bore, and force ratings.
The SAI upgrade introduces an advanced piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note that 155 mm is a non-standard stroke length for this series.
Airtac SI80 Standard Air Cylinder SI80AX155S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX155S |
| Bore size | Ø80 mm |
| Stroke | 155 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 SAI80AX155S 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 SAI80AX155S 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 SI80AX155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×155 | 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 SI80AX155S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for mid-force clamping tasks in environments where standard carbon steel rods face corrosion risks.
Non-Standard Stroke Diversion
Provides a specific 155 mm travel for package routing gates requiring exact non-standard reach and 2513 N push force.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX155S with the SAI80AX155S
To replace the SI80AX155S, order the SAI80AX155S. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the 80 mm bore, 155 mm stroke, G3/8 port, and M20x1.5 rod thread. Because 155 mm is a non-standard stroke, confirm availability. If downsizing, the 63 mm bore yields 1559 N at 0.5 MPa; if upsizing, the 100 mm bore provides 3927 N. Remember that a standard 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. The SAI family also adds the SAIF self-valve option.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX155S
- ✓ 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 SI80AX155S FAQ
Yes, the SI80AX155S is discontinued. The direct replacement is the SAI80AX155S. It is dimensionally interchangeable per ISO 15552, maintaining the same 80 mm bore, 155 mm stroke, G3/8 port, and mounting interface.
It uses a G3/8 port. The force ratings are: 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX155S replacement — usually within 7-8 hours.