This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX85S, 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 SI200BX85S
The AirTAC Airtac SI200 Standard Cylinder SI200BX85S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 85mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX85S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke85 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX85S
- 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 SI200BX85S
The AirTAC SI200BX85S is a discontinued double-acting ISO 15552 profile cylinder with an 85 mm stroke and a 200 mm bore, delivering 15708 N of thrust at 0.5 MPa through its G3/4 port. As an end-of-life product, it is replaced directly by the SAI200BX85S. This direct successor matches the original bore, stroke, force, port, and ISO 15552 mounting interface, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This specific SI unit includes a SUS304 stainless steel rod for corrosion resistance and a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200BX85S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX85S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX85S |
| Bore size | Ø200 mm |
| Stroke | 85 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 SAI200BX85S 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 SAI200BX85S 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 SI200BX85S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×85 | 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 SI200BX85S Is Used
Heavy Press Systems
Drives large platens in pneumatic presses, utilizing the 15708 N push force at 0.5 MPa to form or stamp heavy industrial materials.
Large Valve Actuation
Actuates oversized industrial process valves, relying on the robust 40 mm piston rod and G3/4 air supply to maintain reliable high-force movement.
Replacing the Airtac SI200 Standard Cylinder SI200BX85S with the SAI200BX85S
To replace the SI200BX85S, order the SAI200BX85S. Confirm the ISO 15552 mounting interface, the 200 mm bore, the 85 mm stroke, the G3/4 port, and your specific mounting accessory. Because this unit has the -S magnet, it supports CS1-B/DS1-B switches, while the SAI replacement family uses current AirTAC sensors. If you need to adjust force, the neighboring 160 mm bore yields 10053 N at 0.5 MPa, whereas pushing this 200 mm bore to 0.7 MPa provides 21991 N. A plain cylinder drifts without live air, so for load holding use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. The cushion only decelerates near the stroke ends.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX85S
- ✓ 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 SI200BX85S FAQ
Yes, the SI200BX85S is discontinued. The direct replacement is the SAI200BX85S. It is dimensionally interchangeable per ISO 15552, retaining the same 200 mm bore, 85 mm stroke, output force, G3/4 port, and mounting interface.
It features a G3/4 air port. The force ratings are: 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, and a theoretical maximum of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX85S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX85S replacement — usually within 7-8 hours.