This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X90S, 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 SI80X90S
The AirTAC SI80 Standard Air Cylinder SI80X90S 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 SAI80X90S, 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 → SAI80X90S
- 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 SI80X90S
The AirTAC SI80X90S is a discontinued double-acting ISO 15552 profile cylinder with a 90 mm stroke, delivering 2513 N push force at 0.5 MPa. It features a Ø25 mm piston rod, M20x1.5 thread, and a G3/8 air port. AirTAC replaced this legacy unit with the SAI80X90S, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. The SAI family also expands functionality with SAIL, SAIF, and BSAI lock or integrated valve variants that the original SI lacked. Your existing CS1-B/DS1-B legacy sensors will mount to the magnet groove, though the SAI replacement family uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X90S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X90S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X90S |
| 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 SAI80X90S 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 SAI80X90S 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 SI80X90S
| 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 SI80X90S Is Used
Mid-Tonnage Pressing
Applies 2513 N of push force at 0.5 MPa for seating bearings, stamping light gauge materials, or pressing pins in automated machining cells.
Package Diversion
Drives robust routing arms or pop-up gates on high-throughput packaging lines, utilizing the 90 mm stroke to clear product profiles quickly.
Pallet Lift Stops
Acts as a heavy-duty end-stop or positioning lug in conveyor endpoints, safely halting pallets up to 128 kg in vertical lift scenarios.
Replacing the Airtac SI80 Standard Air Cylinder SI80X90S with the SAI80X90S
To replace the discontinued SI80X90S, order the SAI80X90S. Confirm your existing fixture matches the ISO 15552 mounting interface (LB, FA, CA, TC, etc.) and that the G3/8 port and M20x1.5 rod thread are correct. Because the -S suffix denotes a magnetic piston, verify you are using CS1-B/DS1-B sensors (or upgrade to current AirTAC switches for the SAI). If sizing up or down, neighboring bores are 63 mm and 100 mm; at 0.5 MPa, this 80 mm bore yields 2513 N push and 2268 N pull. Note that a standard double-acting cylinder drifts when air is removed or the valve is centered—the adjustable 36 mm air cushions only decelerate the piston near stroke end. For load-holding requirements, select the SAIL or BSAI lock variant, or install an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X90S
- ✓ 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 SI80X90S FAQ
Yes, the SI80X90S is discontinued. The direct replacement is the AirTAC SAI80X90S. It features the same ISO 15552 mounting interface, 80 mm bore, 90 mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At 0.7 MPa it pushes 3518 N, and at 0.9 MPa it pushes 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and temperature range is -20 to +70 C.
Request a Quote for the SAI80X90S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X90S replacement — usually within 7-8 hours.