This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X25SLB, 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 SI80X25SLB
The AirTAC SI80 Standard Air Cylinder SI80X25SLB 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 SAI80X25SLB, 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 → SAI80X25SLB
- 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 SI80X25SLB
The AirTAC SI80X25SLB is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore, 25 mm stroke, LB foot mount, and a built-in piston magnet (S) for CS1-B/DS1-B switches. Delivering 2513 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI80X25SLB.
The SAI80X25SLB is a direct replacement matching the ISO 15552 mounting interface, bore, stroke, force, and port. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure. For high heat, Viton H seals raise the temperature limit to 150 C.
Airtac SI80 Standard Air Cylinder SI80X25SLB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X25SLB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X25SLB |
| 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 SAI80X25SLB 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 SAI80X25SLB 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 SI80X25SLB
| 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 SI80X25SLB Is Used
Short-Stroke Clamping
Ideal for holding heavy castings during machining, using the 25 mm stroke to rapidly secure parts with 2513 N of force at 0.5 MPa.
Pallet Diverter
Mounts via LB foot bracket to actuate routing gates on high-capacity material handling lines, benefiting from the 30-800 mm/s speed range.
Replacing the Airtac SI80 Standard Air Cylinder SI80X25SLB with the SAI80X25SLB
To replace the SI80X25SLB, order the SAI80X25SLB and confirm the ISO 15552 interface, 80 mm bore, 25 mm stroke, G3/8 port (PT/G/NPT), LB foot mount, and the S magnet. The 80 mm bore yields 2513 N push at 0.5 MPa; if less force is needed, a 63 mm bore gives 1559 N. The cushion only decelerates; it does not hold load on air loss. For secure holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. If you need a self-contained valve, the SAIF variant fits bores up to 100 mm.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X25SLB
- ✓ 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 SI80X25SLB FAQ
Yes, the AirTAC SI80X25SLB is discontinued. The direct replacement is the SAI80X25SLB. It matches the ISO 15552 mounting interface, 80 mm bore, 25 mm stroke, output force, G3/8 port, and LB foot mount, fitting existing fixtures perfectly.
It features a G3/8 air port and provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical maximum force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X25SLB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X25SLB replacement — usually within 7-8 hours.