This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX145S, 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 SI200BX145S
The AirTAC Airtac SI200 Standard Cylinder SI200BX145S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 145mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX145S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke145 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX145S
- 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 SI200BX145S
The AirTAC SI200BX145S is a discontinued double-acting ISO 15552 profile cylinder. As a legacy 200 mm bore unit, it delivered 15708 N of push force at 0.5 MPa through a G3/4 port. AirTAC replaced this EOL model with the SAI200BX145S, a direct upgrade retaining the exact same mounting interface, 145 mm stroke, force class, and M36x2 rod thread.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. This specific SKU includes a -B SUS304 stainless piston rod for corrosion resistance and an -S magnet for legacy CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200BX145S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX145S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX145S |
| Bore size | Ø200 mm |
| Stroke | 145 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 SAI200BX145S 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 SAI200BX145S 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 SI200BX145S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×145 | 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 SI200BX145S Is Used
Heavy Press Stamping
Drives large metal forming presses requiring high thrust, using the 21991 N push force at 0.7 MPa to shape thick steel plates.
Injection Mold Clamping
Secures large industrial molds during high-pressure injection cycles, relying on the robust 40 mm SUS304 rod and 50 mm cushions.
Replacing the Airtac SI200 Standard Cylinder SI200BX145S with the SAI200BX145S
To replace the SI200BX145S, order the SAI200BX145S. Confirm the ISO 15552 mounting interface, 200 mm bore, 145 mm stroke, G3/4 port (PT/G/NPT thread options), and your specific mounting accessory. This unit has the -S magnet and -B SUS304 rod; the SAI uses current AirTAC switches while the legacy SI used CS1-B/DS1-B. If sizing down, a 160 mm bore yields 10053 N push at 0.5 MPa; if sizing up, note the 3204 kgf maximum at 1.0 MPa. A plain cylinder drifts on air loss as the cushion only decelerates, so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. The SAI family also adds the SAIF self-valve variant for compact needs.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX145S
- ✓ 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 SI200BX145S FAQ
Yes, the SI200BX145S is discontinued. The direct replacement is the SAI200BX145S. It is dimensionally interchangeable per ISO 15552, matching the 200 mm bore, 145 mm stroke, force, G3/4 port, and mounting fixtures perfectly.
The 200 mm bore uses a G3/4 port. Theoretical forces 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 maximum force of 3204 kgf at 1.0 MPa. Speed range is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX145S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX145S replacement — usually within 7-8 hours.