This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX70, 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 SI80AX70
The AirTAC SI80 Standard Air Cylinder SI80AX70 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX70, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX70
- 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 SI80AX70
The AirTAC SI80AX70 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 70mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa, operating at speeds of 30-800 mm/s via a G3/8 port. AirTAC replaced this legacy unit with the SAI80AX70, a direct replacement sharing the exact ISO 15552 mounting interface, M20x1.5 rod thread, and 36mm cushions.
Because this SKU lacks a magnet, it cannot accept a position switch. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure, and adds SAIL, SAIF, and BSAI variants the SI line lacked. Note the SUS420J2 stainless rod option; a plain cylinder drifts on air loss, so use a pilot check valve for load holding.
Airtac SI80 Standard Air Cylinder SI80AX70 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX70 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX70 |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAI80AX70 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 SAI80AX70 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 SI80AX70
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SI80AX70 Is Used
Mid-Tonnage Pressing
Applies 2513 N of push force at 0.5 MPa for seating bearings or light stamping tasks within a 70mm travel.
Heavy Package Diverting
Provides robust actuation to push heavy pallets or totes off a main conveyor line using the ISO 15552 mounting.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX70 with the SAI80AX70
To replace the discontinued SI80AX70, order the SAI80AX70. Confirm the ISO 15552 mounting interface, the 80mm bore, 70mm stroke, G3/8 port, and M20x1.5 rod thread. This non-magnetic SKU cannot take a sensor, but if you need position feedback, select an SAI80X70S and use current AirTAC switches. The 80mm bore yields 2513 N push at 0.5 MPa; if you need less force, step down to a 63mm bore (1559 N), or up to 100mm (3927 N). A plain cylinder does not hold load without live air, so for drop protection use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant. The -A suffix denotes the SUS420J2 stainless rod, which you should specify if corrosion resistance is required.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX70
- ✓ 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 SI80AX70 FAQ
Yes, the AirTAC SI80AX70 is discontinued. The direct replacement is the SAI80AX70. It shares the identical ISO 15552 mounting interface, 80mm bore, 70mm stroke, G3/8 port, and output force, dropping straight into existing fixtures.
This double-acting cylinder uses a G3/8 air port. It generates 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 maximum of 513 kgf at 1.0 MPa.
Request a Quote for the SAI80AX70
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX70 replacement — usually within 7-8 hours.