This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX270, 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 SI80AX270
The AirTAC SI80 Standard Air Cylinder SI80AX270 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX270, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX270
- 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 SI80AX270
The AirTAC SI80AX270 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 270 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa, operating at speeds of 30-800 mm/s through a G3/8 port. The direct replacement is the SAI80AX270, sharing the same interface, force, and mounting.
This SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -A suffix indicates a SUS420J2 stainless steel rod for corrosion resistance. Note this SKU lacks a magnet and cannot take a sensor. For load holding, the cushion only decelerates; use an external rod lock or pilot check valve.
Airtac SI80 Standard Air Cylinder SI80AX270 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX270 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX270 |
| Bore size | Ø80 mm |
| Stroke | 270 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 SAI80AX270 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 SAI80AX270 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 SI80AX270
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SI80AX270 Is Used
Package Diverting
Drives diverter arms on sorting lines where the 2513 N push force easily redirects heavy cartons at 30-800 mm/s.
Clamp Actuation
Secures stainless steel workpieces for machining, utilizing the SUS420J2 rod option to resist coolant corrosion.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX270 with the SAI80AX270
To replace the SI80AX270, order the SAI80AX270. It drops into existing fixtures per the ISO 15552 mounting interface, matching the 80 mm bore, 270 mm stroke, G3/8 port (PT/G/NPT options), M20x1.5 thread, and SUS420J2 stainless rod. If you need a magnetic switch for position sensing, you must select an SAI variant with the -S suffix, as this no-S SKU cannot accept one. If your application drops to a 63 mm bore, force falls to 1559 N push; stepping up to 100 mm provides 3927 N. Because the 270 mm stroke exceeds 300 mm, ensure adequate guide support to prevent rod bending and side-load wear. A plain cylinder does not hold load without live air; for drop prevention, consider the SAIL or BSAI lock variants, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX270
- ✓ 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 SI80AX270 FAQ
Yes, the SI80AX270 is discontinued. The direct replacement is the SAI80AX270. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 80 mm bore, 270 mm stroke, force, G3/8 port, and mounting accessories.
This 80 mm bore cylinder features a G3/8 air port and M20x1.5 rod thread. It provides 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 force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX270
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX270 replacement — usually within 7-8 hours.