This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X170STC, 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 SI80X170STC
The AirTAC SI80 Standard Air Cylinder SI80X170STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 170mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X170STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke170 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X170STC
- 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 SI80X170STC
The AirTAC SI80X170STC is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 170mm stroke, delivering 2513N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI80X170STC, a direct upgrade sharing the exact ISO 15552 mounting interface, TC trunnion mount, and M20x1.5 rod thread.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The TC mount design integrates the trunnion directly, and the included -S magnet supports CS1-B/DS1-B legacy sensors.
Airtac SI80 Standard Air Cylinder SI80X170STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X170STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X170STC |
| Bore size | Ø80 mm |
| Stroke | 170 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 SAI80X170STC 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 SAI80X170STC 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 SI80X170STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×170 | 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 SI80X170STC Is Used
Press Fit Assembly
Drives bearings or pins into housings, utilizing the 2513N push force at 0.5 MPa for reliable mid-tonnage insertion tasks.
Pallet Diversion
Actuates TC-mounted routing gates on packaging lines, where the ISO 15552 trunnion interface handles high lateral pivot stresses.
Vertical Lift Stops
Raises heavy product stops or 128kg vertical lift mechanisms, relying on the 80mm bore's robust pull force and adjustable cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80X170STC with the SAI80X170STC
To replace the discontinued SI80X170STC, order the SAI80X170STC keeping the 80mm bore, 170mm stroke, G3/8 port, and TC trunnion mounting. The SAI family introduces variants the SI lacked, such as the SAIL air-released lock, SAIF integrated 4M valve, and BSAI clamp-lock. If you need to hold a load without live air, note that a plain cylinder drifts and its cushion only decelerates; use the SAIL/BSAI lock variant or an external pilot check valve. For downward sizing, a 63mm bore yields 1559N push at 0.5MPa; upward, a 100mm bore yields 3927N. At 170mm stroke, side-load risks are low, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X170STC
- ✓ 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 SI80X170STC FAQ
Yes, the SI80X170STC is discontinued. The direct replacement is the SAI80X170STC. It shares the same ISO 15552 mounting interface, 80mm bore, 170mm stroke, G3/8 port, and TC trunnion mount, fitting directly into existing fixtures.
The bore is 80mm with a G3/8 air port and M20x1.5 rod thread. It delivers 2513N push and 2268N pull at 0.5 MPa, 3518N push at 0.7 MPa, 4523N push at 0.9 MPa, and a theoretical maximum force of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X170STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X170STC replacement — usually within 7-8 hours.