This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X25TC, 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 SI80X25TC
The AirTAC SI80 Standard Air Cylinder SI80X25TC 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 SAI80X25TC, 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 → SAI80X25TC
- 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 SI80X25TC
The AirTAC SI80X25TC is a discontinued double-acting ISO 15552 profile cylinder with a 25 mm stroke and TC trunnion mount. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this unit with the SAI80X25TC, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force and port.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot hold position without live air and cannot accept a sensor.
Airtac SI80 Standard Air Cylinder SI80X25TC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X25TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X25TC |
| 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 SAI80X25TC 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 SAI80X25TC 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 SI80X25TC
| 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 SI80X25TC Is Used
Short-Stroke Clamping
Ideal for high-force 25 mm clamping tasks in machining fixtures where a compact stroke and 2513 N thrust secure heavy workpieces.
Transfer Stops
Provides robust stopping power on assembly lines, using the TC trunnion mount to handle side loads while halting pallets.
Ejector Mechanisms
Delivers rapid 30-800 mm/s ejection of finished parts from press beds, leveraging the 80 mm bore's 2268 N pull force.
Replacing the Airtac SI80 Standard Air Cylinder SI80X25TC with the SAI80X25TC
To replace the SI80X25TC, order the SAI80X25TC and confirm the ISO 15552 TC trunnion mount, 80 mm bore, 25 mm stroke, G3/8 port (PT/G/NPT) and M20x1.5 rod thread. Because this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor; order an -S variant if position sensing is required. Sizing both ways: dropping to a 63 mm bore yields 1559 N push at 0.5 MPa, while stepping up to 100 mm provides 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X25TC
- ✓ 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 SI80X25TC FAQ
Yes, the SI80X25TC is discontinued. The direct replacement is the SAI80X25TC. It shares the same ISO 15552 TC mounting interface, 80 mm bore, 25 mm stroke, output force and G3/8 port, fitting existing fixtures perfectly.
The 80 mm bore uses a G3/8 port. Force ratings are 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 max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X25TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X25TC replacement — usually within 7-8 hours.