This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X125SFB, 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 SI200X125SFB
The AirTAC SI200 Standard Cylinder SI200X125SFB 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 SAI200X125SFB, 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 → SAI200X125SFB
- 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 SI200X125SFB
The AirTAC SI200X125SFB is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 125mm stroke. Delivering 15708 N push force at 0.5 MPa, it features a G3/4 port, M36x2 rod thread, and an FB flange mount. AirTAC replaced this legacy unit with the SAI200X125SFB, a direct replacement retaining the exact ISO 15552 mounting interface, force, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This unit includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family also adds SAIL and BSAI lock variants absent in the SI line.
Airtac SI200 Standard Cylinder SI200X125SFB Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X125SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X125SFB |
| 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 SAI200X125SFB 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 SAI200X125SFB 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 SI200X125SFB
| 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 SI200X125SFB Is Used
Heavy Stamping Press
Drives large heavy-duty stamping and forming presses requiring up to 15708 N of push force at 0.5 MPa.
Automotive Assembly Jig
Clamps major automotive chassis components in assembly jigs using the rigid FB flange interface.
Replacing the Airtac SI200 Standard Cylinder SI200X125SFB with the SAI200X125SFB
To replace the SI200X125SFB, order the SAI200X125SFB. Verify your ISO 15552 interface, 200mm bore, 125mm stroke, G3/4 port, and FB flange mounting. The -S magnet equates to legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches. Sizing both ways: a 160mm bore yields 10053 N push at 0.5 MPa, while a 200mm bore hits 21991 N at 0.7 MPa. Note that a plain cylinder drifts without live air—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Rod material options include carbon steel, SUS420J2 (A), or SUS304 (B); seal options include Viton H for high temp.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X125SFB
- ✓ 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 SI200X125SFB FAQ
Yes, the SI200X125SFB is discontinued. The direct replacement is the AirTAC SAI200X125SFB. It shares the identical ISO 15552 mounting interface, 200mm bore, 125mm stroke, G3/4 port, and output force, fitting existing fixtures perfectly.
This double-acting cylinder features a G3/4 air port. It 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 maximum force of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X125SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X125SFB replacement — usually within 7-8 hours.