This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X520S, 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 SI80X520S
The AirTAC SI80 Standard Air Cylinder SI80X520S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 520mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X520S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke520 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X520S
- 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 SI80X520S
The AirTAC SI80X520S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, adjustable air cushions, and a built-in magnet. Delivering 2513 N of push force at 0.5 MPa, it is replaced by the SAI80X520S. This direct successor shares the exact 80 mm bore, 520 mm stroke, G3/8 port, and ISO 15552 mounting interface. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure, and adds SAIL, SAIF, and BSAI variants the SI lacked.
The original SI-S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. Rod material options include carbon steel, SUS420J2, or SUS304.
Airtac SI80 Standard Air Cylinder SI80X520S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X520S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X520S |
| Bore size | Ø80 mm |
| Stroke | 520 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 SAI80X520S 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 SAI80X520S 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 SI80X520S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×520 | 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 SI80X520S Is Used
Pallet Diversion
Actuates heavy diverters on packaging lines, utilizing the 2513 N push force to shift loaded pallets reliably at 0.5 MPa.
Press Ejection
Ejects formed metal parts from presses, using the 520 mm stroke and adjustable 36 mm cushions to decelerate at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X520S with the SAI80X520S
To replace the SI80X520S, order the SAI80X520S. Confirm the ISO 15552 mounting interface, 80 mm bore, 520 mm stroke, G3/8 port (PT/G/NPT thread), and mounting accessory. The -S magnet designation means it accepts CS1-B/DS1-B sensors. Sizing both ways: a neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore offers 3927 N. Note that a plain cylinder drifts without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 520 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X520S
- ✓ 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 SI80X520S FAQ
Yes, the SI80X520S is discontinued. The direct replacement is the AirTAC SAI80X520S. It shares the same ISO 15552 mounting interface, 80 mm bore, 520 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The bore is 80 mm with a G3/8 port. Force ratings are: push 2513 N and pull 2268 N at 0.5 MPa, push 3518 N at 0.7 MPa, push 4523 N at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X520S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X520S replacement — usually within 7-8 hours.