This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X125H, 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 SI80X125H
The AirTAC SI80 Standard Air Cylinder SI80X125H 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 SAI80X125H, 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 → SAI80X125H
- 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 SI80X125H
The AirTAC SI80X125H 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. The direct replacement is the SAI80X125H, matching the interface, force, and port exactly. This SKU features a Viton H seal for 0-150 C high-temp environments but lacks a magnet, so it cannot accept a sensor.
Upgrading to the SAI80X125H adds a two Y-shaped one-way piston seal for low start-up pressure. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI80 Standard Air Cylinder SI80X125H Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X125H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X125H |
| 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 SAI80X125H 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 SAI80X125H 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 SI80X125H
| 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 SI80X125H Is Used
High-Temperature Forming
Ideal for pressing or clamping parts near ovens, leveraging the Viton H seal to withstand 0-150 C ambient heat while delivering 2513 N of thrust.
Machining Clamps
Secures dense castings inside CNC enclosures where high temperatures and 80 mm bore force are required to hold workpieces firmly during cutting.
Replacing the Airtac SI80 Standard Air Cylinder SI80X125H with the SAI80X125H
To replace the SI80X125H, order the SAI80X125H to retain the exact ISO 15552 mounting dimensions, 125 mm stroke, M20x1.5 rod thread, and G3/8 port. Because this specific SKU has no magnet (-S), it cannot support legacy CS1-B/DS1-B sensors; confirm if sensing is needed. The Viton H seal on this unit allows 0-150 C operation, a feature to preserve. For sizing alternatives, a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore provides 3927 N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant instead of relying on the 36 mm air cushions.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X125H
- ✓ 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 SI80X125H FAQ
Yes, the AirTAC SI80X125H is discontinued. The direct replacement is the SAI80X125H. It shares the same ISO 15552 mounting interface, 80 mm bore, 125 mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
This 80 mm bore cylinder uses a G3/8 port and delivers 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa it pushes 3518 N, and 4523 N at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X125H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X125H replacement — usually within 7-8 hours.