This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX375, 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 SI80AX375
The AirTAC SI80 Standard Air Cylinder SI80AX375 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 SAI80AX375, 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 → SAI80AX375
- 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 SI80AX375
The AirTAC SI80AX375 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions. It delivers 2513 N push and 2268 N pull at 0.5 MPa, utilizing a G3/8 port and an M20x1.5 rod thread. The direct replacement is the SAI80AX375, which maintains the exact bore, stroke, force, port, and ISO 15552 mounting interface for seamless fixture integration.
This SKU features a SUS420J2 stainless steel rod for corrosion resistance but lacks a magnet, so it cannot accept legacy CS1-B/DS1-B switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that plain cylinders drift without live air; for load holding, explore the SAIL or BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80AX375 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX375 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX375 |
| 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 SAI80AX375 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 SAI80AX375 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 SI80AX375
| 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 SI80AX375 Is Used
Mid-Tonnage Pressing
Applies up to 3518 N at 0.7 MPa for seating bearings and clinching sheet metal assemblies without hydraulic fluid.
Pallet Diversion
Uses the 375 mm stroke to push heavy pallets off a main conveyor line onto a secondary packaging spur.
Vertical Lift Gates
Raises and lowers automated warehouse security gates, requiring external guides to manage the long rod extension.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX375 with the SAI80AX375
To replace the discontinued SI80AX375, order the SAI80AX375, ensuring the ISO 15552 mounting interface, 80 mm bore, 375 mm stroke, G3/8 port, and SUS420J2 rod are specified. Because this unit lacks a magnet (-S), it cannot support position sensing; if sensing is needed, select an SAI80X375S. Size both ways: verify if neighboring bores (63 mm or 100 mm) better match your force needs, as 63 mm offers 1559 N push while 100 mm provides 3927 N at 0.5 MPa. With a 375 mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage. A plain cylinder does not hold load on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX375
- ✓ 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 SI80AX375 FAQ
Yes, the SI80AX375 is discontinued. The direct replacement is the SAI80AX375. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 375 mm stroke, G3/8 port, and mounting interface to fit existing fixtures directly.
It uses a G3/8 port and 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 max of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX375
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX375 replacement — usually within 7-8 hours.