This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX65S, 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 SI80AX65S
The AirTAC SI80 Standard Air Cylinder SI80AX65S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 65mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX65S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke65 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX65S
- 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 SI80AX65S
The AirTAC SI80AX65S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N of push force at 0.5 MPa. It features a SUS420J2 stainless piston rod (-A), a built-in magnet (-S) for CS1-B/DS1-B legacy sensors, and a G3/8 air port. AirTAC replaced this end-of-life unit with the SAI80AX65S.
The SAI80AX65S is a direct replacement retaining the exact ISO 15552 mounting interface, 65 mm stroke, and 513 kgf maximum force. The upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure, and adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80AX65S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX65S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX65S |
| Bore size | Ø80 mm |
| Stroke | 65 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 SAI80AX65S 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 SAI80AX65S 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 SI80AX65S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×65 | 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 SI80AX65S Is Used
Stainless Rod Clamping
Clamps machined aluminum parts in humid CNC cells using the SUS420J2 rod to resist coolant corrosion while applying 2513 N of clamping force.
Pallet Stopper Gate
Raises and lowers a 128 kg pallet stop gate in a vertical lift fixture, utilizing the built-in magnet for end-of-stroke position confirmation.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX65S with the SAI80AX65S
To replace the SI80AX65S, order the SAI80AX65S direct: it matches the ISO 15552 mounting dimensions, 80 mm bore, 65 mm stroke, G3/8 port, and M20x1.5 rod thread. Confirm your thread standard (PT/G/NPT) and mounting accessory (LB, FA, TC, etc.). The -S magnet enables CS1-B/DS1-B sensors, while the -A rod provides SUS420J2 stainless steel corrosion resistance. If you need more force, the 100 mm bore offers 3927 N push at 0.5 MPa; if less is required, the 63 mm bore provides 1559 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. For integrated locking, consider the SAIL or BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX65S
- ✓ 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 SI80AX65S FAQ
Yes, the SI80AX65S is discontinued. The direct replacement is the SAI80AX65S. It is dimensionally interchangeable per ISO 15552, matching the exact bore, stroke, force, G3/8 port, and mounting interface, so it fits existing fixtures directly.
The bore is 80 mm with a G3/8 air port. At 0.5 MPa it provides 2513 N push and 2268 N pull force. At 0.7 MPa the push force is 3518 N, and the theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX65S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX65S replacement — usually within 7-8 hours.