This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX35S, 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 SI80AX35S
The AirTAC SI80 Standard Air Cylinder SI80AX35S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 35mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX35S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke35 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX35S
- 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 SI80AX35S
The AirTAC SI80AX35S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a built-in piston magnet. It delivers 2513 N push force at 0.5 MPa through its 80 mm bore, 25 mm rod, and G3/8 port. The direct replacement is the SAI80AX35S, which matches the original bore, stroke, output force, port size, and ISO 15552 mounting interface for a seamless fixture swap.
This specific unit features the SUS420J2 stainless steel piston rod (-A) for corrosion resistance. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Remember that a standard cylinder drifts without live air; for load holding, consider the SAIL or BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80AX35S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX35S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX35S |
| Bore size | Ø80 mm |
| Stroke | 35 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 SAI80AX35S 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 SAI80AX35S 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 SI80AX35S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×35 | 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 SI80AX35S Is Used
Short-Stroke Clamping
Ideal for high-force 35 mm clamping tasks in machining fixtures, utilizing the 80 mm bore's 2513 N push at 0.5 MPa to secure heavy workpieces.
Product Diversion
Provides robust actuation for diverting heavy goods on packaging lines, where the SUS420J2 stainless rod offers resistance against washdown environments.
Pallet Stopping
Acts as a heavy-duty end-stop in material handling conveyors, safely halting pallets using adjustable air cushions at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX35S with the SAI80AX35S
To replace this discontinued SI80AX35S, order the SAI80AX35S. Confirm the ISO 15552 mounting interface, the 80 mm bore, the 35 mm stroke, the G3/8 port, and the -S magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). The -A rod denotes SUS420J2 stainless steel. For sizing alternatives, dropping to a 63 mm bore yields 1559 N push at 0.5 MPa, while an 80 mm bore gives 3518 N at 0.7 MPa. A plain cylinder does not hold load on air loss; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The 35 mm stroke is short, so side-load risks are minimal, but always verify rod alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX35S
- ✓ 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 SI80AX35S FAQ
Yes, the AirTAC SI80AX35S is discontinued. The direct replacement is the SAI80AX35S. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 35 mm stroke, 2513 N force, G3/8 port, and mounting interface.
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, 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 SAI80AX35S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX35S replacement — usually within 7-8 hours.