This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX550, 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 SI200AX550
The AirTAC SI200 Standard Cylinder SI200AX550 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 SAI200AX550, 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 → SAI200AX550
- 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 SI200AX550
The AirTAC SI200AX550 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 550mm stroke. Built with an extruded aluminum barrel and adjustable air cushions, it delivers 15708 N of push force at 0.5 MPa. The direct replacement is the SAI200AX550, which matches the original G3/4 port, M36x2 rod thread, and 3204 kgf maximum force.
This SKU uses a SUS420J2 stainless steel rod for corrosion resistance but lacks the -S magnet, meaning it cannot accept CS1-B or DS1-B sensors. The SAI upgrade features a two-piece Y-shaped piston seal for low start-up pressure and long life. For high-heat environments, a Viton H seal option extends operation to 150 C.
Airtac SI200 Standard Cylinder SI200AX550 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX550 |
| 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 SAI200AX550 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 SAI200AX550 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 SI200AX550
| 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 SI200AX550 Is Used
Heavy Press Forming
Drives large stamping and forming presses where the 28274 N output at 0.9 MPa is required to shape thick steel plates.
Injection Mold Clamping
Secures large industrial injection molds, relying on the SUS420J2 stainless rod to resist humid factory environments.
Replacing the Airtac SI200 Standard Cylinder SI200AX550 with the SAI200AX550
To replace the discontinued SI200AX550, order the SAI200AX550. Confirm the ISO 15552 mounting interface, 200mm bore, 550mm stroke, G3/4 port, and your specific mounting accessory. Because this is a no-S SKU, it cannot support magnetic sensing; if position detection is needed, order an SAI with the -S magnet. If you need to adjust force, a 160mm bore yields 10053 N push at 0.5 MPa, while the 200mm bore hits 21991 N at 0.7 MPa. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify the SAIL or BSAI lock variant. Finally, the 550mm stroke demands external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX550
- ✓ 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 SI200AX550 FAQ
Yes, the SI200AX550 is discontinued. The direct replacement is the SAI200AX550. It is dimensionally interchangeable per ISO 15552, matching the same 200mm bore, 550mm stroke, 3204 kgf max force, G3/4 port, and mounting interface.
This double-acting cylinder operates at 0.15-1.0 MPa (proof 1.5 MPa) with a speed of 30-500 mm/s. It features a 40mm rod, M36x2 thread, and 50mm cushions. Force output is 15708 N push / 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 SAI200AX550
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX550 replacement — usually within 7-8 hours.