This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1775S, 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 SI80X1775S
The AirTAC SI80 Standard Air Cylinder SI80X1775S 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 SAI80X1775S, 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 → SAI80X1775S
- 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 SI80X1775S
The AirTAC SI80X1775S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 1775mm stroke. Because 1775mm exceeds the 1500mm standard maximum, this is a non-standard made-to-order unit. It delivers 2513 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy series with the SAI80X1775S, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and accessories.
The SAI upgrade features a redesigned piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use a SAIL lock variant or external rod lock for holding.
Airtac SI80 Standard Air Cylinder SI80X1775S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1775S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1775S |
| 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 SAI80X1775S 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 SAI80X1775S 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 SI80X1775S
| 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 SI80X1775S Is Used
Long-Stroke Material Transfer
Pushes heavy pallets between conveyor lines over a 1775mm distance, utilizing the 2513 N thrust at 0.5 MPa to overcome friction.
High-Bay Elevator Actuation
Lifts goods vertically up to 1775mm, requiring external guides due to the extended rod length and a pilot check valve to prevent drifting on air loss.
Large Door Manipulation
Opens and closes heavy industrial bulkhead doors or machine guards, relying on the 80mm bore's 3518 N push force at 0.7 MPa for reliable operation.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1775S with the SAI80X1775S
To replace the SI80X1775S, order the SAI80X1775S. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G3/8 port thread (PT/G/NPT), and the M20x1.5 rod thread. Because the 1775mm stroke exceeds the 1500mm standard maximum, expect a made-to-order lead time. At this length, side-load and rod-bending risks are high; always use an external guide to prevent premature seal failure. If you need less force, the 63mm bore offers 1559 N push at 0.5 MPa; if you need more, the 100mm bore provides 3927 N. A plain cylinder does not hold load without live air, so for vertical applications specify the SAIL air-released lock, the BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1775S
- ✓ 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 SI80X1775S FAQ
Yes, the SI80X1775S is discontinued. The direct replacement is the AirTAC SAI80X1775S. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 1775mm stroke, G3/8 port, and mounting interface, so it fits existing fixtures perfectly.
At 0.5 MPa it provides 2513 N push and 2268 pull force. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and the G3/8 port and M20x1.5 rod thread are fixed by the 80mm bore.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1775S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1775S replacement — usually within 7-8 hours.