This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX850, 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 SI80AX850
The AirTAC SI80 Standard Air Cylinder SI80AX850 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 850mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX850, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX850
- 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 SI80AX850
The AirTAC SI80AX850 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 850mm stroke. It delivers 2513N push force at 0.5MPa through a G3/8 port. The direct replacement is the SAI80AX850, matching the interface, force and stroke.
The SAI upgrade uses two Y-shaped one-way piston seals for low start-up pressure. This SKU has an SUS420J2 stainless rod (-A) but no magnet, so it cannot take a sensor. Note the 850mm stroke requires external guides to prevent rod bending.
Airtac SI80 Standard Air Cylinder SI80AX850 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX850 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX850 |
| Bore size | Ø80 mm |
| Stroke | 850 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 SAI80AX850 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 SAI80AX850 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 SI80AX850
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×850 | 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 SI80AX850 Is Used
Long-Stroke Diversion
Actuates large diverter arms on material handling lines, utilizing the 850mm stroke and 2513N push force at 0.5 MPa to push heavy pallets across wide transfer belts.
Stainless Rod Washdown
Operates food-grade or washdown equipment where the SUS420J2 stainless piston rod provides necessary corrosion resistance against moisture and cleaning chemicals.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX850 with the SAI80AX850
To replace the SI80AX850, order the SAI80AX850. Verify the ISO 15552 mounting interface, 850mm stroke, G3/8 port, and SUS420J2 rod. Because this SKU lacks a magnet (-S), it cannot accept CS1-B/DS1-B sensors; order a magnet-equipped version if position detection is needed. For sizing, a neighbouring 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. The 850mm stroke demands external guides to manage side-load and rod-bending risks. A plain cylinder drifts on air loss; for load holding, specify an external pilot check valve, rod lock, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX850
- ✓ 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 SI80AX850 FAQ
Yes, the SI80AX850 is discontinued. The direct replacement is the SAI80AX850. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 850mm stroke, 513 kgf max force, G3/8 port, and mounting interface. The SAI features an upgraded piston seal for lower start-up pressure.
This double-acting cylinder uses a G3/8 port, an M20x1.5 rod thread, and operates at 30-800 mm/s. Force ratings at various pressures are: 2513N push and 2268N pull at 0.5 MPa, 3518N push at 0.7 MPa, 4523N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX850
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX850 replacement — usually within 7-8 hours.