This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX550, 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 SI200BX550
The AirTAC Airtac SI200 Standard Cylinder SI200BX550 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 550mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX550, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke550 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX550
- 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 SI200BX550
The AirTAC SI200BX550 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 550mm stroke. Delivering 15708 N push force at 0.5 MPa via a G3/4 port, it is replaced by the SAI200BX550. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force and port size.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnet SKU cannot take a sensor, though legacy SI sensors were CS1-B/DS1-B. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI200 Standard Cylinder SI200BX550 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX550 |
| Bore size | Ø200 mm |
| Stroke | 550 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 SAI200BX550 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 SAI200BX550 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 SI200BX550
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×550 | 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 SI200BX550 Is Used
Heavy Stamp Pressing
Generates 15708 N at 0.5 MPa to form thick metal plates and drive large stamping dies in automotive lines.
Large Clamp Actuation
Secures oversized castings during machining, using the 550mm stroke to accommodate varied part dimensions.
Replacing the Airtac SI200 Standard Cylinder SI200BX550 with the SAI200BX550
To replace the SI200BX550, order the SAI200BX550. Confirm the ISO 15552 mounting interface, 200mm bore, 550mm stroke, G3/4 port (PT/G/NPT thread options) and mounting accessory. This non-magnet version cannot accept a sensor; if sensing is needed, specify an SAI model with a magnet and current AirTAC switches. Sizing both ways: a neighbouring 160mm bore yields 10053 N push at 0.5 MPa, while a 200mm bore hits 21991 N at 0.7 MPa. A plain cylinder does not hold load on air loss; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For the 550mm stroke, use external guides to prevent rod-bending and side-load damage. Rod material options include carbon steel or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX550
- ✓ 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 SI200BX550 FAQ
Yes, the SI200BX550 is discontinued. The direct replacement is the SAI200BX550. It shares the same ISO 15552 mounting interface, 200mm bore, 550mm stroke, output force, G3/4 port and accessories, fitting existing fixtures perfectly.
It features a G3/4 port and delivers 15708 N push / 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and 28274 N push at 0.9 MPa. The theoretical max force is 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX550
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX550 replacement — usually within 7-8 hours.