This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX425, 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 SI200BX425
The AirTAC SI200 Standard Cylinder SI200BX425 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 425mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX425, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke425 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX425
- 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 SI200BX425
The AirTAC SI200BX425 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 425mm stroke. It delivers 15708 N push force at 0.5 MPa via a G3/4 port. The direct replacement is the SAI200BX425, matching the exact interface, stroke, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU has a SUS304 stainless rod (option B) but lacks a magnet, so it cannot take a CS1-B/DS1-B sensor.
Airtac SI200 Standard Cylinder SI200BX425 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX425 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX425 |
| Bore size | Ø200 mm |
| Stroke | 425 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 SAI200BX425 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 SAI200BX425 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 SI200BX425
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×425 | 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 SI200BX425 Is Used
Heavy Press Forming
Applies the 15708 N push force at 0.5 MPa for stamping and forming large metal panels in automotive assembly lines.
Mold Clamping
Secures large injection molds using the M36x2 rod thread, maintaining high clamping pressure in industrial manufacturing.
Replacing the Airtac SI200 Standard Cylinder SI200BX425 with the SAI200BX425
To replace the SI200BX425, order the SAI200BX425 and confirm the ISO 15552 mounting interface, 425mm stroke, and G3/4 port. Because this SKU lacks an -S magnet, it cannot accept position sensors; if sensing is needed, specify a magnet on the new SAI. At 0.5 MPa it yields 15708 N push and 15080 N pull; dropping to bore 160 gives 10053 N push, while raising pressure to 0.7 MPa provides 21991 N. A 425mm stroke requires external guides to prevent rod bending under side loads. The cushion only decelerates; for load holding on air loss, use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX425
- ✓ 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 SI200BX425 FAQ
Yes, the SI200BX425 is discontinued. The direct replacement is the SAI200BX425, which matches the ISO 15552 mounting interface, 200mm bore, 425mm stroke, force, and G3/4 port.
It features a G3/4 port and delivers 15708 N push and 15080 N pull at 0.5 MPa. At 0.7 MPa push is 21991 N, and the theoretical max is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX425
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX425 replacement — usually within 7-8 hours.