This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X125S, 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 SI200 Standard Cylinder SI200X125S
The AirTAC SI200 Standard Cylinder SI200X125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X125S
- 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 SI200 Standard Cylinder SI200X125S
The AirTAC SI200X125S is a discontinued double-acting ISO 15552 profile cylinder offering 15708 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI200X125S, a direct upgrade retaining the exact 200 mm bore, 125 mm stroke, G3/4 port, M36x2 rod thread and ISO 15552 mounting interface.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The original SI200X125S includes a magnet for CS1-B/DS1-B sensors, while the SAI family introduces SAIL and BSAI lock variants absent in the SI line.
Airtac SI200 Standard Cylinder SI200X125S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X125S |
| Bore size | Ø200 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI200X125S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
The SAI200X125S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI200 Standard Cylinder SI200X125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×125 | 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 SI200 Standard Cylinder SI200X125S Is Used
Heavy Press Forming
Generates 21991 N at 0.7 MPa for bending thick metal plates and driving large stamping dies in automotive fabrication lines.
Injection Mold Clamping
Secures heavy industrial molds using the 15708 N push force at 0.5 MPa, relying on the rigid ISO 15552 profile barrel.
Replacing the Airtac SI200 Standard Cylinder SI200X125S with the SAI200X125S
To replace the SI200X125S, order the SAI200X125S and confirm the ISO 15552 mounting interface, 200 mm bore, 125 mm stroke, G3/4 port (PT/G/NPT options), and the -S magnet for current AirTAC switches. If downsizing, a 160 mm bore yields 10053 N at 0.5 MPa; if upsizing is impossible, note the 3204 kgf maximum at 1.0 MPa. A plain cylinder drifts on air loss as the 50 mm cushion only decelerates—for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI variants. Since the stroke is 125 mm, side-load risks are minimal, but ensure rod alignment to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X125S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI200 Standard Cylinder SI200X125S FAQ
Yes, the SI200X125S is discontinued. The direct replacement is the AirTAC SAI200X125S. It is dimensionally interchangeable per ISO 15552, matching the 200 mm bore, 125 mm stroke, G3/4 port, and mounting accessories for a seamless fixture swap.
The SI200X125S delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, and a theoretical max of 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s, and the G3/4 port feeds the 40 mm piston rod.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X125S replacement — usually within 7-8 hours.