This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X50FB, 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 SI200X50FB
The AirTAC Airtac SI200 Standard Cylinder SI200X50FB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 50mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X50FB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke50 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X50FB
- 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 SI200X50FB
The AirTAC SI200X50FB is a discontinued double-acting ISO 15552 profile cylinder with an FB flange mount, delivering 15708 N push force at 0.5 MPa through its 200 mm bore and G3/4 port. AirTAC replaced this legacy unit with the SAI200X50FB, a direct upgrade retaining the exact stroke, force, and mounting interface.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For load holding, note that a standard cylinder drifts without live air; use the SAIL or BSAI lock variants if needed.
Airtac SI200 Standard Cylinder SI200X50FB Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X50FB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X50FB |
| Bore size | Ø200 mm |
| Stroke | 50 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 SAI200X50FB 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 SAI200X50FB 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 SI200X50FB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×50 | 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 SI200X50FB Is Used
Heavy Press Tonnage
Generates 21991 N at 0.7 MPa for high-force stamping, forming, and riveting operations requiring immense push energy.
Massive Platen Lowering
Ideal for safely driving heavy industrial platens or molds down with adjustable 50 mm cushioning at stroke end.
Industrial Clamp Systems
Provides 15080 N pull force at 0.5 MPa to secure large fabricated structures or heavy machinery bases during machining.
Replacing the Airtac SI200 Standard Cylinder SI200X50FB with the SAI200X50FB
To replace the SI200X50FB, order the SAI200X50FB, confirming the ISO 15552 FB flange interface, 200 mm bore, 50 mm stroke, and G3/4 port. The SAI family adds SAIL, SAIF, and BSAI variants the SI lacked. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B switches. Sizing down, a 160 mm bore yields 10053 N push at 0.5 MPa; sizing up is not possible as 200 mm is the largest. Note that a plain cylinder drifts on air loss—use an external rod lock or pilot check valve for holding. With a 50 mm stroke, side-load risks are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X50FB
- ✓ 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 SI200X50FB FAQ
Yes, the SI200X50FB is discontinued. The direct replacement is the SAI200X50FB, which matches the ISO 15552 mounting interface, 200 mm bore, 50 mm stroke, force, and G3/4 port.
It features a G3/4 port and delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and a theoretical max of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X50FB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X50FB replacement — usually within 7-8 hours.