This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X900STC, 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 SI80X900STC
The AirTAC SI80 Standard Air Cylinder SI80X900STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X900STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X900STC
- 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 SI80X900STC
The AirTAC SI80X900STC is a discontinued double-acting ISO 15552 profile cylinder with a 900 mm stroke, delivering 2513 N of push force at 0.5 MPa through a G3/8 port. It features a TC trunnion mount and an integrated magnet for legacy CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI80X900STC, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, and output force.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. If your application requires positive load holding on air loss, note that a standard cylinder drifts; you should specify the SAIL lock or BSAI clamp-lock variant instead.
Airtac SI80 Standard Air Cylinder SI80X900STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X900STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X900STC |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAI80X900STC 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 SAI80X900STC 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 SI80X900STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SI80X900STC Is Used
Long-Stroke Diversion
Actuates large sorting gates on packaging conveyors, utilizing the 900 mm stroke to clear wide product lanes reliably.
Pallet Push-Off
Provides the 2513 N push force at 0.5 MPa needed to slide heavy pallets or totes off an accumulation roller bed.
Material Lowering
Lowers stacked components into machining fixtures, requiring external guides to manage side-load over the 900 mm extension.
Replacing the Airtac SI80 Standard Air Cylinder SI80X900STC with the SAI80X900STC
To replace the SI80X900STC, order the SAI80X900STC. Verify your ISO 15552 TC trunnion mounting fixture, the 80 mm bore, the 900 mm stroke, and the G3/8 port. Keep the -S magnet option for current AirTAC switch compatibility. The bore yields 2513 N push at 0.5 MPa; if downsizing to a 63 mm bore (1559 N) is considered, ensure it meets your force requirements, or step up to a 100 mm bore (3927 N) for higher loads. Because the 900 mm stroke exceeds 300 mm, use an external guide to prevent rod bending and side-load damage. A plain cylinder does not hold load without live air; use a pilot check valve or the SAIL/BSAI lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X900STC
- ✓ 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 SI80X900STC FAQ
Yes, the SI80X900STC is discontinued. The direct replacement is the SAI80X900STC. It shares the identical ISO 15552 mounting interface, 80 mm bore, 900 mm stroke, output force, and G3/8 port, fitting directly into your existing TC trunnion fixtures.
The 80 mm bore uses a G3/8 port. Force output is 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X900STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X900STC replacement — usually within 7-8 hours.