This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX40, 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 SI80AX40
The AirTAC SI80 Standard Air Cylinder SI80AX40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX40
- 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 SI80AX40
The AirTAC SI80AX40 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 40 mm stroke. It delivers 2513 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80AX40, a direct replacement sharing the exact same ISO 15552 mounting interface, stroke, output force, and accessories. The current-production SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
This specific SKU includes the -A option (SUS420J2 stainless steel piston rod) instead of standard carbon steel, but lacks the -S magnet suffix, meaning it cannot accept CS1-B or DS1-B sensors. Note that a plain cylinder drifts without live air; for load holding, consider the SAIL lock or BSAI clamp-lock variants.
Airtac SI80 Standard Air Cylinder SI80AX40 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX40 |
| Bore size | Ø80 mm |
| Stroke | 40 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 SAI80AX40 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 SAI80AX40 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 SI80AX40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×40 | 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 SI80AX40 Is Used
Short-Stroke Clamping
Ideal for high-force 80 mm bore clamping fixtures requiring a compact 40 mm stroke to secure heavy workpieces during machining.
Press Fit Assembly
Provides reliable 2513 N push force at 0.5 MPa for pressing bearings or pins into housings on automated assembly lines.
Heavy Duty Ejection
The SUS420J2 stainless rod option excels in moist environments, delivering robust ejection force to push finished parts out of machinery.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX40 with the SAI80AX40
To replace the discontinued SI80AX40, order the SAI80AX40. Verify your ISO 15552 mounting fixtures, the 40 mm stroke, and the G3/8 port threads (PT, G, or NPT). This unit has the -A SUS420J2 stainless rod and no magnet, so it cannot support position sensing; if you need switches, select an SAI80X40S model and use current AirTAC sensors. The 80 mm bore yields 2513 N push at 0.5 MPa; if undersized, the neighboring 100 mm bore provides 3927 N. Because this is a double-acting cylinder, the air cushion only decelerates the load near stroke end—it does not hold position. For secure load holding on air loss, use an external pilot check valve or explore the SAIL and BSAI locking variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX40
- ✓ 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 SI80AX40 FAQ
Yes, the AirTAC SI80AX40 is discontinued. The direct replacement is the SAI80AX40. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 40 mm stroke, 2513 N force, G3/8 port, and mounting interface.
The 80 mm bore features a G3/8 port and M20x1.5 rod thread. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Request a Quote for the SAI80AX40
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX40 replacement — usually within 7-8 hours.