This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX950S, 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 SI80AX950S
The AirTAC SI80 Standard Air Cylinder SI80AX950S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 950mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX950S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX950S
- 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 SI80AX950S
The AirTAC SI80AX950S is a discontinued double-acting ISO 15552 profile cylinder with a 950 mm stroke, SUS420J2 stainless rod, and a built-in magnet. Delivering 2513 N push at 0.5 MPa, it is replaced by the SAI80AX950S. This direct upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and 513 kgf max force.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. The SI magnet supports legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80AX950S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX950S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX950S |
| Bore size | Ø80 mm |
| Stroke | 950 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 SAI80AX950S 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 SAI80AX950S 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 SI80AX950S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×950 | 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 SI80AX950S Is Used
Long-Stroke Diversion
Pushes heavy pallets across 950 mm transfer lines where the 2513 N thrust at 0.5 MPa handles substantial inertia.
Vertical Material Lift
Raises ~128 kg loads in two-to-one margin applications, utilizing the SUS420J2 stainless rod for humid settings.
Automated Press Feed
Feeds stock into presses with the 80 mm bore, relying on adjustable 36 mm cushions to decelerate the long stroke.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX950S with the SAI80AX950S
To replace the SI80AX950S, order the SAI80AX950S. Confirm the ISO 15552 mounting fixture, 80 mm bore, 950 mm stroke, G3/8 port, and M20x1.5 thread. The -A denotes a SUS420J2 stainless rod and -S denotes the magnet for position sensing. Neighbouring bores are 63 mm (1559 N [email protected]) and 100 mm (3927 N). Note that a 950 mm stroke requires external guides to prevent rod bending and side-load wear. A plain cylinder drifts without air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX950S
- ✓ 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 SI80AX950S FAQ
Yes, the SI80AX950S is discontinued. The direct replacement is the SAI80AX950S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 950 mm stroke, 513 kgf max force, G3/8 port, and mounting interface.
The 80 mm bore has a G3/8 air port. It generates 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 max force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX950S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX950S replacement — usually within 7-8 hours.