This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX1775S, 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 SI80BX1775S
The AirTAC SI80 Standard Air Cylinder SI80BX1775S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1775mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX1775S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1775 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX1775S
- 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 SI80BX1775S
The AirTAC SI80BX1775S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel. It features a SUS304 stainless piston rod (-B), a built-in magnet (-S), and delivers 2513 N push force at 0.5 MPa via its G3/8 port. Because its 1775 mm stroke exceeds the 1500 mm standard maximum, it was produced as a non-standard, made-to-order unit.
AirTAC replaced this legacy unit with the SAI80BX1775S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, and force. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure.
Airtac SI80 Standard Air Cylinder SI80BX1775S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX1775S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX1775S |
| Bore size | Ø80 mm |
| Stroke | 1775 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 SAI80BX1775S 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 SAI80BX1775S 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 SI80BX1775S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1775 | 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 SI80BX1775S Is Used
Long-Stroke Material Transfer
Drives heavy pallets across extended conveyor sections where the 2513 N push force and 1775 mm travel distance are required for automated assembly lines.
Large Fixture Actuation
Deploys oversized welding or machining fixtures over long distances, relying on the 36 mm adjustable air cushions to decelerate heavy moving masses safely.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX1775S with the SAI80BX1775S
To replace the SI80BX1775S, order the SAI80BX1775S and verify your ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches. The -B SUS304 rod is retained for corrosion resistance. For sizing, a 63 mm bore yields 1559 N push at 0.5 MPa, whereas a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; use a pilot check valve or SAIL/BSAI lock variant for load holding. Because the 1775 mm stroke exceeds the 1500 mm standard and is non-standard, external guides are critical to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX1775S
- ✓ 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 SI80BX1775S FAQ
Yes, the SI80BX1775S is discontinued. The direct replacement is the SAI80BX1775S. It shares the same ISO 15552 mounting interface, 80 mm bore, 1775 mm stroke, G3/8 port, and force ratings, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/8 air port. It generates 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 SAI80BX1775S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX1775S replacement — usually within 7-8 hours.