This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X870S, 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 SI80X870S
The AirTAC SI80 Standard Air Cylinder SI80X870S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 870mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X870S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke870 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X870S
- 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 SI80X870S
The AirTAC SI80X870S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 870 mm stroke. Delivering 2513 N push force at 0.5 MPa, it is superseded by the SAI80X870S. This direct replacement shares the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread. The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life.
This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors. Note that plain cylinders drift without live air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants the SI line lacked.
Airtac SI80 Standard Air Cylinder SI80X870S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X870S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X870S |
| Bore size | Ø80 mm |
| Stroke | 870 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 SAI80X870S 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 SAI80X870S 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 SI80X870S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×870 | 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 SI80X870S Is Used
Long-Stroke Diverters
Drives large sorting arms on packaging lines where the 870 mm stroke shifts heavy pallets laterally across conveyor belts.
Vertical Material Lifts
Raises goods up to 128 kg in automated storage systems, utilizing the 2513 N push force safely with external linear guides.
Large Press Ejection
Ejects molded parts from industrial presses, relying on the 36 mm adjustable air cushions to decelerate the 80 mm bore at high speeds.
Replacing the Airtac SI80 Standard Air Cylinder SI80X870S with the SAI80X870S
To replace the SI80X870S, order the SAI80X870S. Confirm the ISO 15552 mounting fixture, 870 mm stroke, G3/8 port, and M20x1.5 rod thread. The -S suffix means it has a magnet for CS1-B/DS1-B switches. If you need less force, the 63 mm bore yields 1559 N push at 0.5 MPa; for more power, the 100 mm bore gives 3927 N. Because the 870 mm stroke is long, prevent rod bending by guiding the load externally. The air cushion only decelerates near stroke end—it will not hold a load on air loss. For that, use an external pilot check valve or explore the SAIL (air-released lock) and BSAI (clamp-lock) variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X870S
- ✓ 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 SI80X870S FAQ
Yes, the SI80X870S is discontinued. The direct replacement is the AirTAC SAI80X870S. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 80 mm bore, 870 mm stroke, output force, G3/8 port, and mounting accessories.
The 80 mm bore uses a G3/8 port. It generates 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X870S
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