This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X1080S, 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 SI125 Standard Cylinder SI125X1080S
The AirTAC SI125 Standard Cylinder SI125X1080S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1080mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X1080S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1080 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X1080S
- 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 SI125 Standard Cylinder SI125X1080S
The AirTAC SI125X1080S is a discontinued double-acting ISO 15552 profile cylinder featuring a 125 mm bore and 1080 mm stroke. Delivering 6136 N push force at 0.5 MPa through a G1/2 port, it is replaced by the SAI125X1080S. This direct upgrade shares identical ISO 15552 mounting dimensions, bore, stroke, and output force, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line. Your -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors, which transitions to current AirTAC switches on the SAI.
Airtac SI125 Standard Cylinder SI125X1080S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X1080S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X1080S |
| Bore size | Ø125 mm |
| Stroke | 1080 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI125X1080S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAI125X1080S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125X1080S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1080 | 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 SI125 Standard Cylinder SI125X1080S Is Used
Heavy Press Ejection
Provides the 6136 N push force at 0.5 MPa needed to reliably eject heavy stamped parts from large press beds over extended cycles.
Pallet Diverting
Handles robust diverting of loaded pallets on assembly lines, utilizing the 1080 mm stroke to clear wide conveying lanes safely.
Replacing the Airtac SI125 Standard Cylinder SI125X1080S with the SAI125X1080S
To replace the SI125X1080S, order the SAI125X1080S, confirming the ISO 15552 mounting interface, 125 mm bore, 1080 mm stroke, G1/2 port, and M27x2 rod thread. The -S magnet suffix means you need current AirTAC switches to replace legacy CS1-B/DS1-B units. Sizing both ways: if force is insufficient, the 160 mm bore offers 10053 N at 0.5 MPa; if oversizing, the 100 mm bore provides 3927 N. Note that 1080 mm exceeds typical standard ranges, so verify side-load limits and use external guides to prevent rod bending. A plain cylinder does not hold load without air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X1080S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125X1080S FAQ
Yes, the SI125X1080S is discontinued. The direct replacement is the SAI125X1080S. It shares the same ISO 15552 mounting interface, 125 mm bore, 1080 mm stroke, output force, and G1/2 port, dropping directly into existing fixtures.
The 125 mm bore features a G1/2 air port. It delivers 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N push at 0.9 MPa, and a theoretical maximum force of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X1080S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X1080S replacement — usually within 7-8 hours.