This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X175STC, 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 SI80X175STC
The AirTAC SI80 Standard Air Cylinder SI80X175STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 175mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X175STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke175 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X175STC
- 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 SI80X175STC
The AirTAC SI80X175STC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI80X175STC, a direct upgrade retaining the exact bore, stroke, M20x1.5 rod thread, and TC trunnion mounting interface. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life.
The SAI family also introduces variants the original SI lacked, such as the SAIL air-released lock and BSAI clamp-lock for secure holding. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, though the SAI replacement uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X175STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X175STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X175STC |
| Bore size | Ø80 mm |
| Stroke | 175 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 SAI80X175STC 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 SAI80X175STC 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 SI80X175STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×175 | 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 SI80X175STC Is Used
Pallet Diversion
Actuates routing arms on packaging lines to divert heavy pallets using the 2513 N push force at 0.5 MPa.
Clamp Actuation
Secures large steel workpieces in CNC machining fixtures, taking advantage of the TC trunnion mount for pivot alignment.
Replacing the Airtac SI80 Standard Air Cylinder SI80X175STC with the SAI80X175STC
To replace the SI80X175STC, order the SAI80X175STC to guarantee dimensional interchangeability per the ISO 15552 mounting interface, matching the 80 mm bore, 175 mm stroke, G3/8 port, and TC trunnion mount. When sizing, consider neighboring bores: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore provides 3927 N. The theoretical maximum force for this 80 mm bore is 513 kgf at 1.0 MPa. Because a standard cylinder drifts without live air and the cushion only decelerates at stroke end, use an external pilot check valve or the SAIL/BSAI lock variant if you need to hold a load. At 175 mm stroke, side-load risks are low, but ensure the TC trunnion alignment is precise to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X175STC
- ✓ 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 SI80X175STC FAQ
Yes, the SI80X175STC is discontinued. The direct replacement is the SAI80X175STC. It is dimensionally interchangeable per ISO 15552, maintaining the same bore, stroke, output force, G3/8 port, and TC mounting interface to fit existing fixtures perfectly.
The 80 mm bore features a G3/8 air port and a 25 mm piston rod. It delivers 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 force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X175STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X175STC replacement — usually within 7-8 hours.