This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX20, 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 SI80AX20
The AirTAC SI80 Standard Air Cylinder SI80AX20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 20mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke20 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX20
- 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 SI80AX20
The AirTAC SI80AX20 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 20mm stroke, delivering 2513N push force at 0.5MPa via a G3/8 port. This version uses a SUS420J2 stainless piston rod for corrosion resistance. As a non-magnet SKU, it cannot accept a position switch.
The factory direct replacement is the SAI80AX20, retaining the exact ISO 15552 mounting interface, bore, stroke and port. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI80 Standard Air Cylinder SI80AX20 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX20 |
| Bore size | Ø80 mm |
| Stroke | 20 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 SAI80AX20 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 SAI80AX20 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 SI80AX20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×20 | 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 SI80AX20 Is Used
Short-Stroke Clamping
Ideal for holding stainless workpieces in machining fixtures where the SUS420J2 rod resists coolant corrosion.
Transfer Diverters
Provides robust 2513N push force to actuate heavy-duty lane diverters and sorting gates on packaging lines.
Press Ejection
Delivers rapid 30-800 mm/s ejection of formed parts from presses using the adjustable 36mm air cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX20 with the SAI80AX20
To replace the SI80AX20, order the SAI80AX20. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port thread (PT/G/NPT) and the M20x1.5 rod thread. Because this SKU lacks a magnet (-S), it cannot support legacy CS1-B/DS1-B sensors; order a magnet-equipped SAI if sensing is needed. If you need more force, the 100mm bore offers 3927N push at 0.5MPa; if less is acceptable, the 63mm bore provides 1559N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or select the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX20
- ✓ 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 SI80AX20 FAQ
Yes, the SI80AX20 is discontinued. The direct replacement is the SAI80AX20, which shares the same ISO 15552 mounting interface, 80mm bore, 20mm stroke, 2513N force and G3/8 port. It fits existing fixtures perfectly.
It features a G3/8 air port. At 0.5MPa it pushes 2513N and pulls 2268N. At 0.7MPa push is 3518N, and the theoretical maximum force is 513kgf at 1.0MPa.
Request a Quote for the SAI80AX20
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX20 replacement — usually within 7-8 hours.