This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X25SN, 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 SI80X25SN
The AirTAC SI80 Standard Air Cylinder SI80X25SN 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 SAI80X25SN, 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 → SAI80X25SN
- 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 SI80X25SN
The AirTAC SI80X25SN is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 25 mm stroke. It features a Ø25 mm carbon steel rod, M20x1.5 thread, G3/8 port, 36 mm adjustable air cushions, and an NBR seal (-N) operating between -20 and +70 C. Delivering 2513 N push force at 0.5 MPa, it includes a piston magnet (-S) for legacy CS1-B/DS1-B sensors.
You must replace it with the SAI80X25SN, a direct sharing the same ISO 15552 mounting interface, force, and port. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Note that a plain cylinder drifts without live air; for load holding, use the SAIL lock or BSAI clamp-lock variant.
Airtac SI80 Standard Air Cylinder SI80X25SN Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X25SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X25SN |
| 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 SAI80X25SN 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 SAI80X25SN 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 SI80X25SN
| 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 SI80X25SN Is Used
Short-Stroke Clamping
Ideal for holding heavy castings during machining, using the 2513 N push force at 0.5 MPa to secure parts firmly within a compact 25 mm travel.
Package Diverting
Provides robust actuation for diverting heavy goods on a packaging line, where the 80 mm bore and NBR seals withstand continuous high-cycle operation.
Pallet Stopping
Acts as a heavy-duty stop gate for loaded pallets, using the 36 mm adjustable air cushions to decelerate impacts safely at the stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X25SN with the SAI80X25SN
To replace the SI80X25SN, order the SAI80X25SN to retain the exact ISO 15552 mounting interface, 80 mm bore, 25 mm stroke, G3/8 port, and magnet for current AirTAC switches. If downsizing, a 63 mm bore yields 1559 N push at 0.5 MPa; if upsizing, a 100 mm bore provides 3927 N. Remember the NBR seal limits temperature to -20/+70 C (consider Viton H for up to 150 C). A plain cylinder does not hold load without live air, as cushions only decelerate; for holding, specify the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X25SN
- ✓ 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 SI80X25SN FAQ
Yes, the SI80X25SN is discontinued. The direct replacement is the SAI80X25SN. It shares the identical ISO 15552 mounting interface, 80 mm bore, 25 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
The G3/8 port delivers a push force of 2513 N and a pull force of 2268 N at 0.5 MPa. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X25SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X25SN replacement — usually within 7-8 hours.