This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X200CA, 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 SI125X200CA
The AirTAC Airtac SI125 Standard Cylinder SI125X200CA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 200mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X200CA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X200CA
- 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 SI125X200CA
The AirTAC SI125X200CA is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 200 mm stroke. It delivers 6136 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI125X200CA, a direct upgrade retaining the exact ISO 15552 mounting interface, CA clevis mount, output force, and stroke.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet, so it cannot accept CS1-B or DS1-B sensors.
Airtac SI125 Standard Cylinder SI125X200CA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X200CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X200CA |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAI125X200CA 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 SAI125X200CA 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 SI125X200CA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SI125X200CA Is Used
Heavy-Duty Pressing
Drives large metal stamping or forming dies requiring up to 8590 N of push force at 0.7 MPa.
Bulk Material Diversion
Actuates large-scale guide rails or diverters on high-capacity material handling conveyors.
Replacing the Airtac SI125 Standard Cylinder SI125X200CA with the SAI125X200CA
To replace the SI125X200CA, order the SAI125X200CA. Verify your ISO 15552 CA clevis mounting hardware, 200 mm stroke, and G1/2 port threads (PT, G, or NPT). Because this SKU has no -S magnet, position sensing is impossible; if you need switches, select an SAI equivalent with a magnet. The 125 mm bore yields 6136 N push at 0.5 MPa; if less force is needed, an 80 mm bore provides 2513 N, while a 160 mm bore offers 10053 N. Remember, a standard cylinder drifts without live air—the cushion only decelerates near stroke end. For load holding on air loss, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X200CA
- ✓ 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 SI125X200CA FAQ
Yes, the SI125X200CA is discontinued. The direct replacement is the AirTAC SAI125X200CA. It shares the identical ISO 15552 interface, 125 mm bore, 200 mm stroke, CA clevis mount, and G1/2 port, fitting directly into existing fixtures.
This double-acting cylinder uses a G1/2 air port. The thrust 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, and 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 SAI125X200CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X200CA replacement — usually within 7-8 hours.