This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X65CB, 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 SI125X65CB
The AirTAC Airtac SI125 Standard Cylinder SI125X65CB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 65mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X65CB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X65CB
- 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 SI125X65CB
The AirTAC SI125X65CB is a discontinued double-acting ISO 15552 profile cylinder with a 125mm bore and 65mm stroke. It delivers 6136N push and 5734N pull at 0.5MPa via a G1/2 port. The direct replacement is the SAI125X65CB, which shares the same interface, force, and CB clevis mount.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. This SKU lacks a magnet, so it cannot take a sensor; CS1-B/DS1-B switches only fit the -S versions.
Airtac SI125 Standard Cylinder SI125X65CB Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X65CB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X65CB |
| Bore size | Ø125 mm |
| Stroke | 65 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 SAI125X65CB 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 SAI125X65CB 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 SI125X65CB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×65 | 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 SI125X65CB Is Used
Heavy Stamping Press
Drives large platens and stamping dies requiring high 6136N thrust at 0.5MPa within a compact 65mm stroke.
Industrial Clamp Rig
Secures heavy fabricated steel frames using the robust CB clevis mount to handle side articulation.
Replacing the Airtac SI125 Standard Cylinder SI125X65CB with the SAI125X65CB
To replace this SI125X65CB, order the SAI125X65CB. Confirm the ISO 15552 CB clevis mount, 65mm stroke, and G1/2 port. It pushes 6136N at 0.5MPa; if undersized, the 160mm bore offers 10053N. This non-magnet SKU cannot hold position on air loss—the 40mm cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X65CB
- ✓ 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 SI125X65CB FAQ
Yes, the SI125X65CB is discontinued. The direct replacement is the SAI125X65CB. It is dimensionally interchangeable per ISO 15552, keeping the same 125mm bore, 65mm stroke, 6136N force, G1/2 port, and CB clevis mounting.
This double-acting cylinder has a G1/2 port. It delivers 6136N push and 5734N pull at 0.5MPa, 8590N push at 0.7MPa, 11045N push at 0.9MPa, and a theoretical max of 1251kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X65CB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X65CB replacement — usually within 7-8 hours.