This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X550, 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 SI80X550
The AirTAC SI80 Standard Air Cylinder SI80X550 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 550mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X550, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X550
- 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 SI80X550
The AirTAC SI80X550 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 550 mm stroke. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is replaced by the direct replacement SAI80X550. This upgrade retains the exact ISO 15552 mounting interface, bore, stroke, and output force, fitting existing fixtures perfectly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Since this specific SI80X550 SKU lacks the -S magnet, it cannot accept a CS1-B or DS1-B sensor.
Airtac SI80 Standard Air Cylinder SI80X550 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X550 |
| Bore size | Ø80 mm |
| Stroke | 550 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 SAI80X550 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 SAI80X550 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 SI80X550
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×550 | 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 SI80X550 Is Used
Long-Stroke Diversion
Pushes heavy pallets across transfer lines using the 550 mm stroke and 2513 N force, requiring external guides to manage side loads.
Material Pressing
Provides reliable downward clamping pressure for assembly fixtures, taking advantage of the 3518 N thrust at 0.7 MPa.
Warehouse Lift Gates
Actuates heavy loading dock doors or gates, where the robust 80 mm bore and adjustable 36 mm cushions absorb end-of-stroke impact.
Replacing the Airtac SI80 Standard Air Cylinder SI80X550 with the SAI80X550
To replace the discontinued SI80X550, order the SAI80X550, confirming the ISO 15552 mounting interface, 80 mm bore, 550 mm stroke, G3/8 port, and M20x1.5 rod thread. Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, specify a magnet on the new SAI. The 80 mm bore yields 2513 N push at 0.5 MPa (neighbouring 63 mm gives 1559 N, 100 mm gives 3927 N). For the 550 mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X550
- ✓ 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 SI80X550 FAQ
Yes, the AirTAC SI80X550 is discontinued. The direct replacement is the SAI80X550. It shares the same ISO 15552 mounting interface, 80 mm bore, 550 mm stroke, output force, and G3/8 port, fitting directly into your existing fixtures.
The 80 mm bore uses a G3/8 port. It delivers 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 force of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X550
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X550 replacement — usually within 7-8 hours.