This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X215CA, 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 SI125X215CA
The AirTAC SI125 Standard Cylinder SI125X215CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 215mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X215CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke215 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X215CA
- 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 SI125X215CA
The AirTAC SI125X215CA is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 215 mm stroke. It delivers 6136 N push force at 0.5 MPa through a G1/2 port. The direct replacement is the SAI125X215CA, which shares the exact CA clevis mounting interface, M27x2 thread, and output force.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a CS1-B/DS1-B sensor.
Airtac SI125 Standard Cylinder SI125X215CA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X215CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X215CA |
| Bore size | Ø125 mm |
| Stroke | 215 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 SAI125X215CA 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 SAI125X215CA 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 SI125X215CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×215 | 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 SI125X215CA Is Used
Heavy Press Forming
Drives large stamping and forming dies requiring high thrust, utilizing the 6136 N push force at 0.5 MPa to shape thick metal components reliably.
Pallet Lift Stations
Lifts loaded pallets in distribution hubs, matching the 313 kg vertical lift capacity to elevate goods smoothly between conveyor tiers.
Automated Clamp Fixtures
Secures heavy machinery frames during machining via the CA clevis mount, absorbing side loads while maintaining rigid clamping pressure.
Replacing the Airtac SI125 Standard Cylinder SI125X215CA with the SAI125X215CA
To replace the SI125X215CA, order the SAI125X215CA. Confirm the ISO 15552 CA clevis mount, 215 mm stroke, G1/2 port, and M27x2 rod thread. Because this SKU has no -S magnet, it cannot accept position sensors. Sizing both ways: a 100 mm bore gives 3927 N [email protected], while a 160 mm bore gives 10053 N. For load holding, note that a plain cylinder drifts on air loss—the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 215 mm stroke, rod bending is low, but for any stroke >=300 mm, guide the load to prevent side-load wear. The SAI family also offers the SAIF valve variant, though only for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X215CA
- ✓ 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 SI125X215CA FAQ
Yes, the SI125X215CA is discontinued. The direct replacement is the SAI125X215CA. It is dimensionally interchangeable per ISO 15552, retaining the same CA clevis mounting, 125 mm bore, 215 mm stroke, G1/2 port, and output force.
The 125 mm bore provides 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. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X215CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X215CA replacement — usually within 7-8 hours.