This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X80CB, 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 SI125X80CB
The AirTAC Airtac SI125 Standard Cylinder SI125X80CB 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 SAI125X80CB, 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 → SAI125X80CB
- 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 SI125X80CB
The AirTAC SI125X80CB is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke. Delivering 6136 N push force at 0.5 MPa, it features a CB clevis mount, a 32 mm rod, and a G1/2 port. The direct replacement is the SAI125X80CB, matching the bore, stroke, force, and ISO 15552 mounting interface.
Because this SKU lacks the -S magnet, it cannot accept a position sensor. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure. For safe sizing, expect a working load of 3682 N or a 313 kg vertical lift. The SAI family also adds BSAI clamp-lock and SAIL air-released lock variants absent in the SI line.
Airtac SI125 Standard Cylinder SI125X80CB Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X80CB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X80CB |
| 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 SAI125X80CB 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 SAI125X80CB 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 SI125X80CB
| 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 SI125X80CB Is Used
Heavy Stamping Press
Drives heavy-duty stamping actuators requiring 6136 N push force at 0.5 MPa with robust CB clevis mounting.
Pallet Diverting
Actuates large-scale pallet routing gates using the 80 mm stroke and 125 mm bore profile barrel.
Material Lift Gate
Lifts bulk material gates safely with a 313 kg vertical lift capacity and ISO 15552 interface.
Replacing the Airtac SI125 Standard Cylinder SI125X80CB with the SAI125X80CB
To replace the SI125X80CB, order the SAI125X80CB and confirm the CB clevis mounting accessory, G1/2 port, and 80 mm stroke. This non-magnetic SKU cannot host CS1-B or DS1-B sensors; if sensing is required, select an SAI model with the S magnet suffix. The 125 mm bore yields 6136 N push at 0.5 MPa; if less force is needed, an 80 mm bore provides 2513 N. For load holding on air loss, a plain cylinder drifts—the cushion only decelerates—so add an external pilot check valve or use the SAIL/BSAI lock variants. Operating speed is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X80CB
- ✓ 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 SI125X80CB FAQ
Yes, the SI125X80CB is discontinued. The direct replacement is the SAI125X80CB. It shares the identical ISO 15552 mounting interface, 125 mm bore, 80 mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
It features a G1/2 port. Force ratings are 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 max of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X80CB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X80CB replacement — usually within 7-8 hours.