This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X85S, 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 SI80X85S
The AirTAC SI80 Standard Air Cylinder SI80X85S 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 SAI80X85S, 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 → SAI80X85S
- 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 SI80X85S
The AirTAC SI80X85S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 85mm stroke. It delivers 2513N push force at 0.5MPa through a G3/8 port. The direct replacement is the SAI80X85S, matching the interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. It adds SAIL, SAIF, and BSAI variants the SI lacked. With -S, this used CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X85S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X85S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X85S |
| 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 SAI80X85S 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 SAI80X85S 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 SI80X85S
| 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 SI80X85S Is Used
Press Fit Tooling
Drives medium-force press operations for bearing insertion, delivering reliable 2513N push force at 0.5MPa.
Pallet Diversion
Actuates heavy-duty lane diverters on conveyor lines, utilizing the 85mm stroke to shift loads smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X85S with the SAI80X85S
To replace the SI80X85S, order the SAI80X85S. Verify the ISO 15552 mounting interface, G3/8 port, M20x1.5 rod thread, and -S magnet. Neighbouring bores are 63mm (1559N push @0.5MPa) and 100mm (3927N). Note: plain cylinders drift on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X85S
- ✓ 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 SI80X85S FAQ
Yes, the SI80X85S is discontinued. The direct replacement is the SAI80X85S. It is dimensionally interchangeable per ISO 15552, offering the same 80mm bore, 85mm stroke, 2513N force, G3/8 port, and mounting interface.
The G3/8 port bore 80mm cylinder provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N at 0.9MPa, and a 513kgf max at 1.0MPa. It operates at 30-800mm/s with 36mm adjustable cushions.
Request a Quote for the SAI80X85S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X85S replacement — usually within 7-8 hours.