This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX90S, 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 SI80BX90S
The AirTAC SI80 Standard Air Cylinder SI80BX90S 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 SAI80BX90S, 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 → SAI80BX90S
- 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 SI80BX90S
The AirTAC SI80BX90S is a discontinued double-acting ISO 15552 profile cylinder with a 90 mm stroke, delivering 2513 N push force at 0.5 MPa. This legacy unit features a SUS304 stainless piston rod (-B), a G3/8 port, and a built-in magnet (-S) for CS1-B/DS1-B switches. AirTAC replaced it with the SAI80BX90S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, and output force.
The SAI80BX90S features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL and BSAI lock variants absent in the SI line, while a plain cylinder drifts on air loss as its cushion only decelerates.
Airtac SI80 Standard Air Cylinder SI80BX90S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX90S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX90S |
| 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 SAI80BX90S 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 SAI80BX90S 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 SI80BX90S
| 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 SI80BX90S Is Used
Stainless Rod Clamping
Ideal for mid-force machining clamps requiring corrosion resistance, using the SUS304 rod to secure heavy fixtures against coolant.
90mm Transfer Diverters
Drives short-stroke diverters on packaging lines, providing 2513 N thrust to push products smoothly across belt junctions.
Pallet Stop Gates
Controls heavy pallet flow by raising and lowering stop gates, safely absorbing kinetic energy with its adjustable cushion.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX90S with the SAI80BX90S
To replace the SI80BX90S, order the SAI80BX90S. It drops directly into existing fixtures via the identical ISO 15552 mounting interface, preserving the 80 mm bore, 90 mm stroke, G3/8 port, and M20x1.5 rod thread. Confirm your mounting accessory (LB, FA, TC, etc.) and retain the -S magnet for current AirTAC switches. When sizing both ways, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N; this 80 mm bore provides 3518 N at 0.7 MPa. Because a standard cylinder does not hold load without live air, use an external pilot check valve or the SAIL lock variant for vertical holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX90S
- ✓ 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 SI80BX90S FAQ
Yes, the SI80BX90S is discontinued. The direct replacement is the SAI80BX90S. It shares the same ISO 15552 mounting interface, 80 mm bore, 90 mm stroke, G3/8 port, and force ratings, fitting existing fixtures perfectly.
At 0.5 MPa it pushes 2513 N and pulls 2268 N. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical max force is 513 kgf at 1.0 MPa, with an operating speed of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX90S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX90S replacement — usually within 7-8 hours.