This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX375S, 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 SI200BX375S
The AirTAC SI200 Standard Cylinder SI200BX375S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 375mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX375S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke375 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX375S
- 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 SI200BX375S
The AirTAC SI200BX375S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 375mm stroke. Delivering 15708 N push force at 0.5 MPa via a G3/4 port, it is replaced by the direct replacement SAI200BX375S, sharing the exact interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. With a 375mm stroke, use external guides to prevent rod bending. The -B rod option is SUS304, and the -S magnet fits CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200BX375S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX375S |
| Bore size | Ø200 mm |
| Stroke | 375 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 SAI200BX375S 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 SAI200BX375S 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 SI200BX375S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×375 | 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 SI200BX375S Is Used
Heavy Press Forming
Applies up to 21991 N at 0.7 MPa for stamping or forming large metal panels, utilizing the 375mm stroke to accommodate deep dies.
Industrial Clamp
Secures large fabricated components during machining or welding, requiring external guides to manage side-load over the 375mm extension.
Replacing the Airtac SI200 Standard Cylinder SI200BX375S with the SAI200BX375S
To replace the SI200BX375S, order the SAI200BX375S, confirming the ISO 15552 mounting interface, 375mm stroke, G3/4 port, and M36x2 thread. The -S magnet enables CS1-B/DS1-B sensors (SAI uses current AirTAC switches). For loads, the 200mm bore yields 15708 N push and 15080 N pull at 0.5 MPa; neighbouring 160mm yields 10053 N. A plain cylinder drifts without air; for load holding use an external rod lock, pilot check valve, or SAIL/BSAI lock variant. At 375mm stroke, add external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX375S
- ✓ 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 SI200BX375S FAQ
Yes, the SI200BX375S is discontinued. The direct replacement is the SAI200BX375S. It is dimensionally interchangeable per ISO 15552, keeping the same 200mm bore, 375mm stroke, G3/4 port, and mounting fixtures.
The 200mm bore uses a G3/4 port. Force output is 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 SAI200BX375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX375S replacement — usually within 7-8 hours.