This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX850S, 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 SI80AX850S
The AirTAC SI80 Standard Air Cylinder SI80AX850S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 850mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX850S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX850S
- 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 SI80AX850S
The AirTAC SI80AX850S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 850 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa, features a SUS420J2 stainless steel rod (-A), and includes a piston magnet (-S) for CS1-B/DS1-B switches. The direct replacement is the SAI80AX850S, retaining the same G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI80 Standard Air Cylinder SI80AX850S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX850S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX850S |
| Bore size | Ø80 mm |
| Stroke | 850 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 SAI80AX850S 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 SAI80AX850S 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 SI80AX850S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×850 | 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 SI80AX850S Is Used
Long-Stroke Diversion
Pushes heavy pallets across transfer lines using the 850 mm stroke and 2513 N push force at 0.5 MPa.
Stainless Pusher
Uses the SUS420J2 rod to index goods in humid storage areas where standard carbon steel rods might corrode.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX850S with the SAI80AX850S
To replace the SI80AX850S, order the SAI80AX850S. It drops into existing fixtures via the identical ISO 15552 mounting interface, matching the 80 mm bore, 850 mm stroke, G3/8 port, and M20x1.5 rod thread. Keep the -S magnet for current AirTAC switches and the -A SUS420J2 stainless rod. If you need more force, the 100 mm bore offers 3927 N push at 0.5 MPa; if less, the 63 mm bore provides 1559 N. Because this is an 850 mm stroke, use external guides to prevent rod bending and side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX850S
- ✓ 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 SI80AX850S FAQ
Yes, the SI80AX850S is discontinued. The direct replacement is the SAI80AX850S. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 850 mm stroke, output force, G3/8 port, and mounting accessories.
It has a G3/8 air port. The force ratings are 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 of 513 kgf at 1.0 MPa. The cushion stroke is 36 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX850S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX850S replacement — usually within 7-8 hours.