This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX400S, 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 SI200BX400S
The AirTAC SI200 Standard Cylinder SI200BX400S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 400mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX400S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX400S
- 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 SI200BX400S
The AirTAC SI200BX400S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 400mm stroke, delivering 15708 N push force at 0.5 MPa. It features a SUS304 stainless steel rod (-B), a built-in magnet (-S) for CS1-B/DS1-B switches, and a G3/4 air port. AirTAC replaced this legacy unit with the SAI200BX400S.
The SAI200BX400S is a direct replacement matching the ISO 15552 mounting interface, bore, output force, and port size. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI200 Standard Cylinder SI200BX400S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX400S |
| Bore size | Ø200 mm |
| Stroke | 400 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 SAI200BX400S 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 SAI200BX400S 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 SI200BX400S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×400 | 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 SI200BX400S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring high thrust, using the 28274 N push force at 0.9 MPa to form thick steel plates.
Large Clamp Fixture
Secures oversized fabricated components during machining, relying on the 15080 N pull force and SUS304 rod for corrosion resistance.
Replacing the Airtac SI200 Standard Cylinder SI200BX400S with the SAI200BX400S
To replace the SI200BX400S, order the SAI200BX400S. Confirm the ISO 15552 mounting interface, 400mm stroke, G3/4 port (PT/G/NPT thread), and mounting accessory. The -B suffix specifies the SUS304 stainless rod, and -S means the magnet is present for CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). If downsizing, a 160mm bore yields 10053 N push at 0.5 MPa; if upsizing is impossible, this 200mm bore maxes at 3204 kgf at 1.0 MPa. Because the stroke is 400mm, use external guides to prevent rod bending under side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX400S
- ✓ 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 SI200BX400S FAQ
Yes, the SI200BX400S is discontinued. The direct replacement is the SAI200BX400S. It shares the same ISO 15552 mounting interface, 200mm bore, 400mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly.
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 SAI200BX400S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX400S replacement — usually within 7-8 hours.