This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X125LB, 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 SI80X125LB
The AirTAC SI80 Standard Air Cylinder SI80X125LB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X125LB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X125LB
- 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 SI80X125LB
The AirTAC SI80X125LB is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 125 mm stroke. It delivers 2513 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI80X125LB, a direct replacement matching the exact ISO 15552 mounting interface, bore, stroke, force, and LB foot mounting dimensions.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. The SAI family also adds SAIL and BSAI lock variants absent from the SI line.
Airtac SI80 Standard Air Cylinder SI80X125LB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X125LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X125LB |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAI80X125LB 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 SAI80X125LB 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 SI80X125LB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SI80X125LB Is Used
Press Fit Assembly
Drives bearings into housings on an automated machining line, utilizing the 2513 N push force at 0.5 MPa to seat heavy components reliably.
Pallet Diverting
Actuates a heavy-duty lane diverter mechanism for routed workpieces, with the LB foot mount securing the 80 mm bore body against high lateral shifting forces.
Replacing the Airtac SI80 Standard Air Cylinder SI80X125LB with the SAI80X125LB
To replace the SI80X125LB, order the SAI80X125LB. Verify your ISO 15552 LB foot mounting, 125 mm stroke, and G3/8 port (PT/G/NPT thread). Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, specify a magnet on the SAI order. The 80 mm bore yields 2513 N push at 0.5 MPa; if undersized, the 100 mm bore offers 3927 N. For load holding, note that a standard cylinder drifts on air loss—the cushion only decelerates. Use an external pilot check valve or choose the SAIL/BSAI lock variants. The 25 mm rod and M20x1.5 thread remain unchanged.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X125LB
- ✓ 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 SI80X125LB FAQ
Yes, the SI80X125LB is discontinued. The direct replacement is the AirTAC SAI80X125LB. It shares the identical ISO 15552 mounting interface, 80 mm bore, 125 mm stroke, output force, G3/8 port, and LB foot mount, fitting directly into existing fixtures.
The 80 mm bore uses a G3/8 port. Force output is 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 maximum of 513 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 36 mm adjustable air cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X125LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X125LB replacement — usually within 7-8 hours.