This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX425S, 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 SI200BX425S
The AirTAC Airtac SI200 Standard Cylinder SI200BX425S 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 SAI200BX425S, 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 → SAI200BX425S
- 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 SI200BX425S
The AirTAC SI200BX425S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 425mm stroke. Delivering 15708 N push force at 0.5 MPa through a G3/4 port, it is replaced by the direct replacement SAI200BX425S. This successor matches the exact ISO 15552 mounting interface, bore, stroke, force, and port, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL and BSAI lock variants absent in the SI line. This specific unit includes a SUS304 stainless rod and a piston magnet for CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200BX425S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX425S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX425S |
| 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 SAI200BX425S 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 SAI200BX425S 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 SI200BX425S
| 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 SI200BX425S Is Used
Heavy Press Forming
Generates up to 3204 kgf at 1.0 MPa for stamping and forming large metal panels in automotive assembly lines.
Mold Clamping
Secures heavy injection molds or large fixtures, utilizing the SUS304 stainless rod for corrosive resin environments.
Replacing the Airtac SI200 Standard Cylinder SI200BX425S with the SAI200BX425S
To replace this SI200BX425S, order the SAI200BX425S, confirming the ISO 15552 mounting interface, 425mm stroke, G3/4 port, and mounting accessory. The included -S magnet works with legacy CS1-B/DS1-B switches, though the SAI replacement family uses current AirTAC switches. Sizing both ways: a 160mm bore yields 10053 N push at 0.5 MPa, while a 200mm bore provides 21991 N at 0.7 MPa. Because the 425mm stroke is long, use external guides to prevent rod-bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding, specify an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX425S
- ✓ 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 SI200BX425S FAQ
Yes, the SI200BX425S is discontinued. The direct replacement is the SAI200BX425S. It is dimensionally interchangeable per ISO 15552, matching the 200mm bore, 425mm stroke, G3/4 port, and mounting interface, so it drops into existing fixtures.
It features a G3/4 air port and M36x2 rod thread. 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; with a theoretical max of 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX425S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX425S replacement — usually within 7-8 hours.