This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X80, 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 SI125X80
The AirTAC Airtac SI125 Standard Cylinder SI125X80 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 80mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X80, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X80
- 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 SI125X80
The AirTAC SI125X80 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke. Generating 6136 N push force at 0.5 MPa, it is replaced directly by the SAI125X80. This direct successor matches the 125 mm bore, G1/2 port, and mounting interface, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor; legacy CS1-B/DS1-B switches require an -S version.
Airtac SI125 Standard Cylinder SI125X80 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X80 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X80 |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAI125X80 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 SAI125X80 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 SI125X80
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SI125X80 Is Used
Heavy Stamping Press
Drives large platens and heavy dies, utilizing the 6136 N push force at 0.5 MPa to form thick metal components reliably.
Pallet Handling Gate
Actuates robust automated guided vehicle gates or heavy payload diverters where high kinetic energy and sturdy 32 mm rod endurance are required.
Industrial Downstroke Press
Applies steady downward pressure for assembly operations, benefiting from the 80 mm stroke and 5734 N pull force for retraction.
Replacing the Airtac SI125 Standard Cylinder SI125X80 with the SAI125X80
To replace the SI125X80, order the SAI125X80, confirming the ISO 15552 interface, 80 mm stroke, G1/2 port (PT/G/NPT), and mounting accessory. If sizing up or down, neighbouring bores offer different forces: the 100 mm bore provides 3927 N push at 0.5 MPa, while the 160 mm bore yields 10053 N. Because this SKU lacks the -S magnet, it cannot accept position sensors. A plain cylinder drifts on air loss, as the 40 mm cushions only decelerate; for load holding, specify an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X80
- ✓ 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 SI125X80 FAQ
Yes, the SI125X80 is discontinued. The direct replacement is the AirTAC SAI125X80. It shares the identical ISO 15552 mounting interface, 125 mm bore, 80 mm stroke, output force, and G1/2 port, dropping straight into existing machinery without mechanical modifications.
The 125 mm bore features a G1/2 air port and M27x2 rod thread. Force output is 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, with a theoretical maximum of 1251 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X80
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X80 replacement — usually within 7-8 hours.