This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX185, 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 SI200BX185
The AirTAC Airtac SI200 Standard Cylinder SI200BX185 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 185mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX185, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke185 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX185
- 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 SI200BX185
The AirTAC SI200BX185 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 185mm stroke. It delivers 15708N push force at 0.5MPa via a G3/4 port. The direct replacement is the SAI200BX185, matching the interface, bore, stroke, force, port and mounting. This SKU lacks a magnet, so it cannot accept a position switch.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL, SAIF and BSAI lock variants. The SUS304 rod option offers corrosion resistance.
Airtac SI200 Standard Cylinder SI200BX185 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX185 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX185 |
| Bore size | Ø200 mm |
| Stroke | 185 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 SAI200BX185 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 SAI200BX185 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 SI200BX185
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×185 | 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 SI200BX185 Is Used
Heavy Press Forming
Applies 21991N at 0.7MPa to form thick metal components, utilizing the 40mm piston rod for high rigidity.
Large Mold Clamping
Secures heavy industrial molds during processing, relying on the 3204kgf theoretical maximum force at 1.0MPa.
Replacing the Airtac SI200 Standard Cylinder SI200BX185 with the SAI200BX185
To replace the SI200BX185, order the SAI200BX185. Verify the ISO 15552 mounting interface, 200mm bore, 185mm stroke, G3/4 port (PT/G/NPT) and mounting accessory. Because this specific SKU has no magnet, it cannot support sensing; if switches are needed, select an SAI equivalent with a magnet. For sizing down, a 160mm bore provides 10053N push at 0.5MPa; sizing up is not available. The plain cylinder does not hold load on air loss; the 50mm cushion only decelerates. For secure holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX185
- ✓ 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 SI200BX185 FAQ
Yes, the SI200BX185 is discontinued. The direct replacement is the SAI200BX185. It is dimensionally interchangeable per ISO 15552, matching the 200mm bore, 185mm stroke, 15708N force, G3/4 port and mounting interface.
It uses a G3/4 air port. Force ratings are 15708N push and 15080N pull at 0.5MPa, 21991N push at 0.7MPa, and 28274N push at 0.9MPa. The theoretical maximum force is 3204kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX185
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX185 replacement — usually within 7-8 hours.