This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX45S, 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 SI200BX45S
The AirTAC Airtac SI200 Standard Cylinder SI200BX45S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 45mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX45S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke45 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX45S
- 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 SI200BX45S
The AirTAC SI200BX45S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 45mm stroke. It delivers 15708 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI200BX45S, matching the exact interface, bore, stroke, force, port and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It also introduces SAIL, SAIF and BSAI variants the SI lacked. This -B model uses a SUS304 stainless rod, the -S magnet works with CS1-B/DS1-B sensors, and a Viton H seal option raises heat to 150 C.
Airtac SI200 Standard Cylinder SI200BX45S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX45S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX45S |
| Bore size | Ø200 mm |
| Stroke | 45 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 SAI200BX45S 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 SAI200BX45S 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 SI200BX45S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×45 | 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 SI200BX45S Is Used
Heavy Stamping
Drives large presses and stamping dies requiring high 15708 N push force at 0.5 MPa over a short 45mm stroke.
Robotic Clamping
Secures oversized fabrication parts using the SUS304 stainless rod option for corrosion resistance in harsh plants.
Replacing the Airtac SI200 Standard Cylinder SI200BX45S with the SAI200BX45S
To replace the SI200BX45S, order the SAI200BX45S. Confirm the ISO 15552 mounting interface, 200mm bore, 45mm stroke, G3/4 port (PT/G/NPT thread), mounting accessory and the -S magnet for CS1-B/DS1-B switches. The SAI uses current AirTAC switches. Sizing both ways: a 160mm bore offers 10053 N push at 0.5 MPa, while pushing this 200mm bore to 0.7 MPa yields 21991 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or SAIL/BSAI variant for held loads. This -B SUS304 rod resists corrosion.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX45S
- ✓ 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 SI200BX45S FAQ
Yes, the SI200BX45S is discontinued. The direct replacement is the SAI200BX45S. It is dimensionally interchangeable per the ISO 15552 mounting interface, keeping the same 200mm bore, 45mm stroke, 15708 N force, G3/4 port and mounting fixtures.
This double-acting cylinder has a G3/4 port. It delivers 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 max of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX45S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX45S replacement — usually within 7-8 hours.