This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX50, 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 SI80AX50
The AirTAC SI80 Standard Air Cylinder SI80AX50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX50
- 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 SI80AX50
The AirTAC SI80AX50 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 50mm stroke, delivering 2513N push and 2268N pull at 0.5MPa. It features a SUS420J2 stainless piston rod (-A) and a G3/8 air port. Because this SKU lacks a magnet, it cannot accept position switches. AirTAC replaced this legacy unit with the SAI80AX50, a direct sharing the exact ISO 15552 mounting interface, force, and port size.
The SAI80AX50 upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The broader SAI family also adds SAIL, SAIF, and BSAI lock variants the SI line lacked.
Airtac SI80 Standard Air Cylinder SI80AX50 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX50 |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAI80AX50 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 SAI80AX50 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 SI80AX50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SI80AX50 Is Used
Stainless Rod Clamping
Ideal for fixturing parts in humid or mildly corrosive environments where the SUS420J2 rod prevents surface degradation during repetitive clamping.
Short-Stroke Diverter
Provides robust 2513N push force to actuate heavy-duty routing gates or diverter arms on high-throughput packaging lines.
Pallet Stopper Gate
Functions as a heavy pneumatic stop in material handling zones, using its 50mm stroke to arrest pallet movement securely.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX50 with the SAI80AX50
To replace the SI80AX50, order the SAI80AX50. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G3/8 port threads, and the 50mm stroke. This unit has a SUS420J2 stainless rod; if corrosion is not a concern, the standard carbon steel rod works. Because this specific SKU has no magnet (-S), it cannot support legacy CS1-B/DS1-B sensors; order a magnet-equipped SAI model if you need position feedback. Sizing options: stepping down to a 63mm bore yields 1559N push at 0.5MPa, while an 80mm bore gives 2513N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or SAIL lock for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX50
- ✓ 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 SI80AX50 FAQ
Yes, the AirTAC SI80AX50 is discontinued. The direct replacement is the SAI80AX50. It shares the identical ISO 15552 mounting interface, 80mm bore, 50mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
This 80mm bore cylinder uses a G3/8 air port. The thrust ratings are: 2513N push and 2268N pull at 0.5MPa; 3518N push at 0.7MPa; 4523N push at 0.9MPa; and a theoretical maximum of 513kgf at 1.0MPa.
Request a Quote for the SAI80AX50
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX50 replacement — usually within 7-8 hours.