This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX135, 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 SI80AX135
The AirTAC SI80 Standard Air Cylinder SI80AX135 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 135mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX135, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX135
- 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 SI80AX135
The AirTAC SI80AX135 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 135mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa, peaking at 513kgf. The direct replacement is the SAI80AX135, sharing the same G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface. Because this SKU lacks the -S magnet, it cannot accept a position switch.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also introduces SAIL, SAIF, and BSAI lock variants the SI lacked. Note the -A rod is SUS420J2 stainless steel; a plain cylinder drifts on air loss, so use a pilot check valve for holding.
Airtac SI80 Standard Air Cylinder SI80AX135 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX135 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX135 |
| Bore size | Ø80 mm |
| Stroke | 135 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 SAI80AX135 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 SAI80AX135 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 SI80AX135
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×135 | 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 SI80AX135 Is Used
Mid-Tonnage Pressing
Applies the 2518N force at 0.7MPa for seating bearings or light stamping tasks within automated machinery.
Package Diversion
Drives 135mm sorting gates or pushers on packaging lines, moving products efficiently without magnetic sensing.
Pallet Lift Stops
Acts as a heavy-duty physical stop or index pin in material handling, utilizing the 25mm SUS420J2 stainless rod.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX135 with the SAI80AX135
To replace the SI80AX135, order the SAI80AX135. Verify your ISO 15552 mounting hardware (LB, FA, TC, etc.), the 135mm stroke, and the G3/8 port. This unit has no -S magnet, so it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, specify an SAI with S. The -A designation indicates a SUS420J2 stainless rod for corrosion resistance over standard carbon steel. For sizing alternatives, a 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. Since stroke is under 300mm, rod bending is minimal, but always guide external loads. A plain cylinder does not hold load without air; for drop prevention, use the SAIL lock variant, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX135
- ✓ 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 SI80AX135 FAQ
Yes, the SI80AX135 is discontinued. The direct replacement is the SAI80AX135. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 135mm stroke, 2513N force, G3/8 port, and mounting interface.
The 80mm bore uses a G3/8 port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX135
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX135 replacement — usually within 7-8 hours.