This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X55, 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 SI80X55
The AirTAC SI80 Standard Air Cylinder SI80X55 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 55mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X55, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke55 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X55
- 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 SI80X55
The AirTAC SI80X55 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 55 mm stroke, delivering 2513 N push force at 0.5 MPa. Because this SI unit is end-of-life, you should order the SAI80X55 direct replacement. It shares the exact same ISO 15552 mounting interface, G3/8 port, and 2513 N output force, dropping straight into existing fixtures.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this specific SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X55 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X55 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X55 |
| Bore size | Ø80 mm |
| Stroke | 55 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 SAI80X55 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 SAI80X55 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 SI80X55
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×55 | 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 SI80X55 Is Used
Mid-Tonnage Pressing
Ideal for applying steady 2513 N clamping force at 0.5 MPa on machining fixtures.
Package Diversion
Drives robust 55 mm stroke diverters and lane changers handling heavy goods.
Pallet Stops
Acts as a heavy-duty end-stop for 80 mm bore pneumatic pallet handling lines.
Replacing the Airtac SI80 Standard Air Cylinder SI80X55 with the SAI80X55
To replace the SI80X55, order the SAI80X55 and confirm your ISO 15552 mounting accessory (LB, FA, CA, TC), G3/8 port thread (PT/G/NPT) and 55 mm stroke. Since this exact SKU lacks the -S magnet, it cannot support position sensing; if you need switches, select an SAI80X55S. For sizing alternatives, a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore offers 3927 N. Remember that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X55
- ✓ 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 SI80X55 FAQ
Yes, the AirTAC SI80X55 is discontinued. The direct replacement is the SAI80X55. It shares the same ISO 15552 mounting interface, 80 mm bore, 55 mm stroke, G3/8 port and output force, fitting your existing fixtures perfectly.
The 80 mm bore features a G3/8 port and M20x1.5 rod thread. 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 maximum theoretical force of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X55
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X55 replacement — usually within 7-8 hours.