This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X150FB, 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 SI80X150FB
The AirTAC SI80 Standard Air Cylinder SI80X150FB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X150FB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X150FB
- 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 SI80X150FB
The AirTAC SI80X150FB is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 150mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI80X150FB, a direct upgrade retaining the exact ISO 15552 mounting interface, M20x1.5 rod thread, and 36mm cushions.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Note this specific SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X150FB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X150FB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X150FB |
| Bore size | Ø80 mm |
| Stroke | 150 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 SAI80X150FB 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 SAI80X150FB 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 SI80X150FB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×150 | 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 SI80X150FB Is Used
Clamping Fixtures
Secures heavy workpieces during machining using its 2513N push force at 0.5MPa, with the FB flange providing rigid mounting.
Product Diverters
Actuates routing gates on high-throughput lines, utilizing the 150mm stroke and 30-800mm/s speed range for rapid cycling.
Pallet Stops
Halts incoming pallets on gravity conveyors, relying on the 36mm adjustable air cushions to absorb kinetic energy smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X150FB with the SAI80X150FB
To replace the SI80X150FB, order the SAI80X150FB. Confirm the FB flange mounting, 80mm bore, 150mm stroke, and G3/8 port. Because this SKU has no -S magnet, it cannot support position sensing; if detection is needed, specify an SAI with the magnet option and current AirTAC switches. For sizing, the 80mm bore yields 2513N at 0.5MPa; dropping to a 63mm bore gives 1559N, while an 100mm bore provides 3927N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X150FB
- ✓ 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 SI80X150FB FAQ
Yes, the SI80X150FB is discontinued. The direct replacement is the SAI80X150FB. It shares the identical ISO 15552 mounting interface, 80mm bore, 150mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The bore is 80mm with a G3/8 port. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513kgf at 1.0MPa. The piston rod is 25mm with an M20x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X150FB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X150FB replacement — usually within 7-8 hours.