This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X355S, 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 SI80X355S
The AirTAC SI80 Standard Air Cylinder SI80X355S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 355mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X355S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke355 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X355S
- 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 SI80X355S
The AirTAC SI80X355S is a discontinued double-acting ISO 15552 profile cylinder with a 355 mm stroke and an integrated piston magnet. Generating 2513 N of push force at 0.5 MPa through its G3/8 port, it is replaced direct by the SAI80X355S. This current-production substitute shares identical ISO 15552 mounting dimensions, bore, stroke, output force, and accessories, fitting directly into existing fixtures.
The SAI upgrade features a modernized piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. The original SI-S magnet supports legacy CS1-B/DS1-B sensors, whereas the SAI family uses current AirTAC switches and introduces lock variants (SAIL, BSAI) absent from the SI line.
Airtac SI80 Standard Air Cylinder SI80X355S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X355S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X355S |
| Bore size | Ø80 mm |
| Stroke | 355 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 SAI80X355S 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 SAI80X355S 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 SI80X355S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×355 | 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 SI80X355S Is Used
Pallet Diversion
Actuates heavy divert arms on packaging lines to redirect loaded pallets using the 2513 N push force at 0.5 MPa.
Press Ejection
Extends 355 mm to eject molded components from deep press cavities, relying on adjustable air cushions for smooth stops.
Replacing the Airtac SI80 Standard Air Cylinder SI80X355S with the SAI80X355S
To replace the SI80X355S, order the SAI80X355S and verify your ISO 15552 mounting accessory (LB, FA, CA, TC, etc.), G3/8 port thread (PT, G, or NPT), and magnet requirement. If you need to adjust force, neighboring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). A standard double-acting cylinder drifts on air loss and its cushions only decelerate near stroke end; for secure load holding, specify an external pilot check valve or the SAIL/BSAI lock variant. Because the 355 mm stroke is long, prevent rod bending by guiding the load externally to avoid side-loading the piston.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X355S
- ✓ 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 SI80X355S FAQ
Yes, the SI80X355S is discontinued. The direct replacement is the AirTAC SAI80X355S. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 355 mm stroke, G3/8 port, and mounting interface, so it fits existing fixtures without modification.
This double-acting cylinder has a 25 mm rod, M20x1.5 thread, 36 mm cushion, and operates at 30-800 mm/s. 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 max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X355S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X355S replacement — usually within 7-8 hours.