This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X90, 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 SI80X90
The AirTAC SI80 Standard Air Cylinder SI80X90 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 90mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X90, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke90 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X90
- 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 SI80X90
The AirTAC SI80X90 is a discontinued double-acting ISO 15552 profile cylinder with a 90 mm stroke, delivering a push force of 2513 N at 0.5 MPa. It features an extruded aluminum barrel, a 25 mm piston rod, and a G3/8 air port. Because this legacy SI unit is end-of-life, you should order the direct replacement: the SAI80X90. It shares the same ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting your existing fixtures perfectly.
The SAI80X90 upgrade introduces a refined piston seal utilizing two Y-shaped one-way elements for extended lifespan and lower start-up pressure. For applications requiring load holding, note that a standard cylinder drifts without live air; the SAI family adds SAIL (air-released lock) and BSAI (clamp-lock) variants the SI line lacked. This specific SKU lacks a magnet (-S) and cannot accept a position sensor.
Airtac SI80 Standard Air Cylinder SI80X90 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X90 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X90 |
| Bore size | Ø80 mm |
| Stroke | 90 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 SAI80X90 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 SAI80X90 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 SI80X90
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×90 | 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 SI80X90 Is Used
Package Diversion
Provides robust actuation for routing heavy pallets or totes on a 90 mm stroke, utilizing the 2513 N push force to reliably pivot diverter arms without bounce.
Press Fit Operations
Ideal for seating bearings or pins into housings on an assembly line, where the precise 90 mm travel and 513 kgf maximum output ensure consistent insertion depth.
Pallet Stopper Gate
Deploys a 90 mm stop blade to halt incoming pallets on a gravity conveyor, absorbing kinetic energy via the adjustable 36 mm air cushions at both ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X90 with the SAI80X90
To replace the discontinued SI80X90, order the SAI80X90, ensuring it matches your ISO 15552 interface, 80 mm bore, 90 mm stroke, and G3/8 port. Confirm your mounting accessory (LB foot, FA flange, or TC trunnion) and thread type (PT, G, or NPT). Since this SKU has no magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, select an SAI80X90S. For sizing alternatives, a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore provides 3927 N. Remember that a plain cylinder does not hold load without live air; for vertical or suspended loads, consider the SAIL lock variant, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X90
- ✓ 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 SI80X90 FAQ
Yes, the SI80X90 is discontinued. The direct replacement is the SAI80X90. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 90 mm stroke, 2513 N force, and G3/8 port, so it drops directly into existing fixtures.
This double-acting cylinder uses a G3/8 air port. It generates a push force of 2513 N and a pull force of 2268 N at 0.5 MPa. At 0.7 MPa the push force is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X90
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X90 replacement — usually within 7-8 hours.