This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X155, 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 SI80X155
The AirTAC SI80 Standard Air Cylinder SI80X155 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 155mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X155, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X155
- 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 SI80X155
The AirTAC SI80X155 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 155 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI80X155, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, output force and port size.
The SAI80X155 upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet, meaning it cannot accept CS1-B or DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X155 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X155 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X155 |
| Bore size | Ø80 mm |
| Stroke | 155 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 SAI80X155 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 SAI80X155 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 SI80X155
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×155 | 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 SI80X155 Is Used
Press Fit Assembly
Drives bearings or pins into housings, utilizing the 2513 N push force at 0.5 MPa for reliable mid-duty press fits.
Pallet Diversion
Actuates diverter arms or pop-up stops on conveyor lines, where the 155 mm stroke provides adequate travel for pallet routing.
Replacing the Airtac SI80 Standard Air Cylinder SI80X155 with the SAI80X155
To replace the discontinued SI80X155, order the SAI80X155. Confirm the ISO 15552 mounting accessory (LB foot, FA flange, TC trunnion) and the G3/8 port match your fixture. Because this SKU has no magnet (-S), it cannot support position sensing; if switches are needed, select an SAI80X155S and use current AirTAC sensors. Sizing checks: a neighbouring 63 mm bore yields 1559 N at 0.5 MPa, while the 100 mm bore provides 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding consider the SAIL lock, BSAI clamp-lock variant, or an external pilot check valve. At 155 mm stroke, side-load and rod-bending risks are minimal, but ensure proper alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X155
- ✓ 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 SI80X155 FAQ
Yes, the SI80X155 is discontinued. The direct replacement is the AirTAC SAI80X155. It shares the identical ISO 15552 mounting interface, 80 mm bore, 155 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly without modifications.
The 80 mm bore uses a G3/8 air 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. The piston rod is 25 mm with an M20x1.5 thread.
Request a Quote for the SAI80X155
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X155 replacement — usually within 7-8 hours.