This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X155STC, 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 SI80X155STC
The AirTAC SI80 Standard Air Cylinder SI80X155STC 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 SAI80X155STC, 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 → SAI80X155STC
- 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 SI80X155STC
The AirTAC SI80X155STC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 155 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI80X155STC, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, force and port size. The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life.
The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B sensors. You can also specify Viton H seals to raise the operating temperature from +70 C up to 150 C, or choose SUS420J2 or SUS304 rod materials.
Airtac SI80 Standard Air Cylinder SI80X155STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X155STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X155STC |
| 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 SAI80X155STC 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 SAI80X155STC 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 SI80X155STC
| 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 SI80X155STC Is Used
Pallet Diversion
Uses the 155 mm stroke to push heavy pallets onto adjacent conveyor lines, leveraging the 2513 N push force at 0.5 MPa to overcome friction.
Press Ejection
Ejects formed metal or plastic parts from press beds, relying on the 80 mm bore and TC trunnion mount to handle off-center side loads smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X155STC with the SAI80X155STC
To replace the SI80X155STC, order the SAI80X155STC. Verify the ISO 15552 TC trunnion mounting interface, the 155 mm stroke, the G3/8 port, and the -S magnet for CS1-B/DS1-B switches (the SAI family uses current AirTAC switches). If you need more force, the neighbouring 100 mm bore yields 3927 N push at 0.5 MPa; if you need less, the 63 mm bore provides 1559 N. A plain cylinder does not hold load on air loss—the cushion only decelerates. For load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant adds a built-in 4M valve for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X155STC
- ✓ 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 SI80X155STC FAQ
Yes, the SI80X155STC is discontinued. The direct replacement is the SAI80X155STC. It shares the identical ISO 15552 mounting interface, 80 mm bore, 155 mm stroke, G3/8 port, and output force, so it fits existing fixtures directly.
The 80 mm bore uses a G3/8 port. It generates 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X155STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X155STC replacement — usually within 7-8 hours.