This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX1550S, 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 SI80BX1550S
The AirTAC SI80 Standard Air Cylinder SI80BX1550S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1550mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX1550S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX1550S
- 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 SI80BX1550S
The AirTAC SI80BX1550S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and a 1550 mm non-standard stroke. Because 1550 mm exceeds the 1500 mm maximum standard stroke for this bore, it is a made-to-order unit. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI80BX1550S, sharing the same interface, stroke, force and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI unit features a SUS304 stainless steel rod for corrosion resistance and a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80BX1550S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX1550S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX1550S |
| Bore size | Ø80 mm |
| Stroke | 1550 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 SAI80BX1550S 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 SAI80BX1550S 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 SI80BX1550S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1550 | 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 SI80BX1550S Is Used
Long-Stroke Material Transfer
Pushes heavy pallets between machining centers over a 1550 mm span, utilizing the 2513 N thrust at 0.5 MPa while relying on external guides to support the extended rod.
Corrosive-Environment Actuation
Actuates large process doors in washdown areas using the SUS304 stainless piston rod, with the G3/8 port handling the necessary air volume for rapid 30-800 mm/s cycling.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX1550S with the SAI80BX1550S
To replace this SI80BX1550S, order the SAI80BX1550S direct equivalent, confirming the ISO 15552 mounting interface, the 1550 mm non-standard stroke, the G3/8 port, and the SUS304 rod. The built-in magnet (-S) allows positioning switches, though you must use current AirTAC switches on the SAI instead of the legacy CS1-B/DS1-B set. When sizing, neighbouring bores are 63 mm and 100 mm; at 0.5 MPa this 80 mm bore provides 2513 N push and 2268 N pull. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify the SAIL or BSAI lock variant. Finally, at 1550 mm, the extended rod is highly susceptible to bending; always use an external guide to prevent side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX1550S
- ✓ 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 SI80BX1550S FAQ
Yes, the SI80BX1550S is discontinued. The direct replacement is the SAI80BX1550S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 1550 mm stroke, force, G3/8 port and mounting fixtures.
This double-acting cylinder operates at 0.15-1.0 MPa (proof 1.5 MPa) with a speed of 30-800 mm/s. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. It uses a G3/8 port and a 36 mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX1550S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX1550S replacement — usually within 7-8 hours.