This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX550SH, 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 SI200BX550SH
The AirTAC SI200 Standard Cylinder SI200BX550SH 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 SAI200BX550SH, 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 → SAI200BX550SH
- 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 SI200BX550SH
The AirTAC SI200BX550SH 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 featured a SUS304 stainless rod and Viton H seals for 0-150 C high-temp environments. AirTAC replaced this end-of-line unit with the SAI200BX550SH.
The SAI200BX550SH is a direct replacement matching the ISO 15552 mounting interface, bore, stroke, force, port and accessories. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life.
Airtac SI200 Standard Cylinder SI200BX550SH Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX550SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX550SH |
| 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 SAI200BX550SH 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 SAI200BX550SH 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 SI200BX550SH
| 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 SI200BX550SH Is Used
Heavy Press Forming
Applies up to 21991 N at 0.7 MPa for stamping and forming large metal panels in hot environments using the Viton H seal.
Mold Actuation
Drives large injection molds over the 550mm travel, relying on the SUS304 stainless rod for corrosive resin environments.
Replacing the Airtac SI200 Standard Cylinder SI200BX550SH with the SAI200BX550SH
To replace the SI200BX550SH, order the SAI200BX550SH. Confirm the ISO 15552 mounting interface, the 550mm stroke, G3/4 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet works with legacy CS1-B/DS1-B sensors, though the SAI family uses current AirTAC switches. Sizing both ways: this 200mm bore gives 15708 N push at 0.5 MPa; dropping to a 160mm bore yields 10053 N. Because 550mm is a long stroke, prevent rod bending by using an external guide to absorb side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX550SH
- ✓ 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 SI200BX550SH FAQ
Yes, the SI200BX550SH is discontinued. The direct replacement is the SAI200BX550SH. It shares the exact same ISO 15552 mounting interface, 200mm bore, 550mm stroke, force, G3/4 port, and mounting accessories, fitting directly into existing fixtures.
It features a G3/4 air port and provides 15708 N push / 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX550SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX550SH replacement — usually within 7-8 hours.