This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X25FTC, 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 SI80X25FTC
The AirTAC SI80 Standard Air Cylinder SI80X25FTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 25mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X25FTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X25FTC
- 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 SI80X25FTC
The AirTAC SI80X25FTC is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 25mm stroke, and an FTC trunnion mounting interface. Delivering 2513N push force at 0.5MPa through a G3/8 port, it is replaced by the SAI80X25FTC. This direct upgrade shares the exact ISO 15552 mounting dimensions, bore, stroke, and force, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because this specific SI SKU lacks the -S magnet suffix, it cannot accept a magnetic sensor (legacy types were CS1-B/DS1-B). The SAI family also adds SAIL and BSAI lock variants absent from the SI line.
Airtac SI80 Standard Air Cylinder SI80X25FTC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X25FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X25FTC |
| Bore size | Ø80 mm |
| Stroke | 25 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 SAI80X25FTC 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 SAI80X25FTC 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 SI80X25FTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×25 | 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 SI80X25FTC Is Used
Short-Stroke Clamping
Ideal for holding heavy workpieces in machining fixtures, utilizing the 2513N push force at 0.5MPa across a compact 25mm travel.
Product Diverting
Provides robust actuation for diverting heavy packages or pallets on a production line via the FTC trunnion mount.
Press Ejection
Delivers rapid 30-800mm/s ejection of finished parts from press dies, absorbing end-of-stroke impact with 36mm adjustable cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80X25FTC with the SAI80X25FTC
To replace the SI80X25FTC, order the SAI80X25FTC. Confirm the ISO 15552 FTC trunnion mount, 80mm bore, 25mm stroke, G3/8 port, and M20x1.5 rod thread. Since this SKU lacks the -S magnet, it cannot support position sensing; order the SAI80X25SFTC if a switch is required. Sizing downward, a 63mm bore yields 1559N push at 0.5MPa; sizing upward, a 100mm bore yields 3927N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variant to hold loads. For any stroke >=300mm, guide the load to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X25FTC
- ✓ 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 SI80X25FTC FAQ
Yes, the SI80X25FTC is discontinued. The direct replacement is the SAI80X25FTC. It shares the identical ISO 15552 FTC mounting interface, 80mm bore, 25mm stroke, output force, and G3/8 port, dropping straight into existing machinery.
The 80mm bore features a G3/8 air port and M20x1.5 rod thread. It generates 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical maximum force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X25FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X25FTC replacement — usually within 7-8 hours.