This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX375S, 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 SI80AX375S
The AirTAC SI80 Standard Air Cylinder SI80AX375S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 375mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX375S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX375S
- 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 SI80AX375S
The AirTAC SI80AX375S is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 375 mm stroke. Featuring a SUS420J2 stainless steel rod and a built-in magnet for CS1-B/DS1-B switches, it delivers 2513 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI80AX375S, which retains the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked. Note that a standard cylinder drifts on air loss; the air cushion only decelerates near stroke end, so use an external rod lock or pilot check valve for load holding.
Airtac SI80 Standard Air Cylinder SI80AX375S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX375S |
| Bore size | Ø80 mm |
| Stroke | 375 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 SAI80AX375S 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 SAI80AX375S 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 SI80AX375S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×375 | 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 SI80AX375S Is Used
Heavy Material Diversion
Handles large product routing on assembly lines using the 2513 N push force at 0.5 MPa to reliably pivot heavy pallets.
Press Ejection Systems
Ejects molded parts from machinery, where the adjustable 36 mm air cushions absorb kinetic energy at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX375S with the SAI80AX375S
To replace the SI80AX375S, order the SAI80AX375S. Confirm the ISO 15552 mounting interface, 80 mm bore, 375 mm stroke, G3/8 port, and your specific mounting accessory. The -A denotes a SUS420J2 stainless rod and -S indicates the magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). For sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; for higher force, a 100 mm bore provides 3927 N. Because the 375 mm stroke is long, use external guides to prevent rod bending and side-load wear. For load holding on air loss, select the SAIL or BSAI lock variant, or add a pilot-operated check valve, as the standard cushion only decelerates.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX375S
- ✓ 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 SI80AX375S FAQ
Yes, the SI80AX375S is discontinued. The direct replacement is the SAI80AX375S. It features the same ISO 15552 mounting interface, 80 mm bore, 375 mm stroke, G3/8 port, and force ratings, fitting existing fixtures perfectly.
The 80 mm bore delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N at 0.9 MPa, and a max force of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s. It uses a G3/8 port and a M20x1.5 rod thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX375S replacement — usually within 7-8 hours.