This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X265S, 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 SI80X265S
The AirTAC SI80 Standard Air Cylinder SI80X265S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 265mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X265S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke265 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X265S
- 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 SI80X265S
The AirTAC SI80X265S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a 265 mm stroke, and a G3/8 port. Delivering 2513 N of push force at 0.5 MPa, it is replaced by the SAI80X265S. This direct upgrade maintains the exact ISO 15552 mounting interface, bore, output force, and accessories, fitting existing fixtures perfectly.
The SAI upgrade utilizes an improved piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original SI80X265S includes a magnet for CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock or self-valve variants the legacy line lacked.
Airtac SI80 Standard Air Cylinder SI80X265S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X265S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X265S |
| Bore size | Ø80 mm |
| Stroke | 265 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 SAI80X265S 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 SAI80X265S 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 SI80X265S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×265 | 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 SI80X265S Is Used
Mid-Tonnage Pressing
Applies 2513 N of thrust at 0.5 MPa for seating bearings, stamping light sheet metal, or clinching components in automated machining cells.
Replacing the Airtac SI80 Standard Air Cylinder SI80X265S with the SAI80X265S
To replace the SI80X265S, order the SAI80X265S direct, confirming the ISO 15552 mounting interface, 80 mm bore, 265 mm stroke, G3/8 port (PT/G/NPT thread options), and the -S magnet for current AirTAC switches. If sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; if sizing up, a 100 mm bore provides 3927 N. Note that a plain cylinder drifts on air loss since the air cushion only decelerates near stroke end—for load holding, specify an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant. Because the 265 mm stroke exceeds 300 mm is false here, standard side-load guidance applies: ensure adequate rod support to prevent bending and premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X265S
- ✓ 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 SI80X265S FAQ
Yes, the SI80X265S is discontinued. The direct replacement is the SAI80X265S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 265 mm stroke, G3/8 port, and mounting interface, so it drops directly into existing fixtures.
The bore is 80 mm with 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. Operating speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X265S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X265S replacement — usually within 7-8 hours.