This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX85S, 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 SI80AX85S
The AirTAC SI80 Standard Air Cylinder SI80AX85S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 85mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX85S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX85S
- 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 SI80AX85S
The AirTAC SI80AX85S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 85mm stroke. Featuring a SUS420J2 stainless steel rod and a built-in magnet for CS1-B/DS1-B sensors, it delivers 2513 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI80AX85S, matching the exact ISO 15552 mounting interface, stroke, and output force.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent from the legacy SI line.
Airtac SI80 Standard Air Cylinder SI80AX85S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX85S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX85S |
| Bore size | Ø80 mm |
| Stroke | 85 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 SAI80AX85S 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 SAI80AX85S 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 SI80AX85S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×85 | 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 SI80AX85S Is Used
Mid-Tonnage Pressing
Applies 2513 N of thrust at 0.5 MPa for seating bearings or light stamping tasks within an 85 mm travel.
Package Diversion
Actuates routing gates or pushers on production lines, utilizing the 30-800 mm/s speed range for rapid cycling.
Vertical Lifting
Raises components up to 128 kg using the stainless SUS420J2 rod, offering reliable motion in humid handling zones.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX85S with the SAI80AX85S
To replace the SI80AX85S, order the SAI80AX85S. Confirm the ISO 15552 mounting fixture, the 85mm stroke, the G3/8 port, and the -S magnet for current AirTAC switches. If downsizing, a 63mm bore yields 1559 N push at 0.5 MPa; if upsizing, a 100mm bore provides 3927 N. This plain cylinder does not hold load without live air—the cushion only decelerates—so use an external rod lock or pilot check valve for hold, or specify an SAIL/BSAI lock variant. The -A rod is SUS420J2 stainless steel for corrosion resistance.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX85S
- ✓ 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 SI80AX85S FAQ
Yes, the SI80AX85S is discontinued. The direct replacement is the SAI80AX85S. It shares the identical ISO 15552 mounting interface, 80mm bore, 85mm stroke, G3/8 port, and force ratings, fitting existing fixtures perfectly.
It uses a G3/8 air port. The thrust 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 SAI80AX85S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX85S replacement — usually within 7-8 hours.