This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX400S, 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 SI200AX400S
The AirTAC SI200 Standard Cylinder SI200AX400S 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 SAI200AX400S, 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 → SAI200AX400S
- 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 SI200AX400S
The AirTAC SI200AX400S 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 SUS420J2 stainless rod, G3/4 port, and a piston magnet for CS1-B/DS1-B sensors. The direct replacement is the SAI200AX400S.
The SAI upgrade retains the ISO 15552 mounting interface, bore, and force, but adds an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. For load holding, use the SAIL or BSAI lock variants, as standard cushions only decelerate.
Airtac SI200 Standard Cylinder SI200AX400S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX400S |
| 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 SAI200AX400S 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 SAI200AX400S 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 SI200AX400S
| 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 SI200AX400S Is Used
Heavy Press Systems
Drives large stamping and forming presses requiring 21991 N push force at 0.7 MPa to shape thick metal components.
Massive Payload Lifts
Elevates 801 kg vertical loads in automated material handling, relying on the 40mm SUS420J2 stainless rod.
Industrial Clamp Rigs
Secures heavy fabricated steel structures during welding, utilizing the 3204 kgf maximum theoretical holding force.
Replacing the Airtac SI200 Standard Cylinder SI200AX400S with the SAI200AX400S
To replace the SI200AX400S, order the SAI200AX400S. Verify the ISO 15552 mounting interface, 400mm stroke, G3/4 port, and the -S magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). The -A rod is SUS420J2 stainless steel. Output is 15708 N at 0.5 MPa; sizing down to bore 160 yields 10053 N. For this 400mm stroke, use external guides to prevent rod bending and side loads. The cylinder will not hold load without air; use SAIL, BSAI, or a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX400S
- ✓ 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 SI200AX400S FAQ
Yes, the SI200AX400S is discontinued. The direct replacement is the SAI200AX400S. It shares the same ISO 15552 mounting interface, 200mm bore, 400mm stroke, G3/4 port, and output force, fitting existing fixtures directly.
It features a G3/4 port. 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 3204 kgf maximum at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX400S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX400S replacement — usually within 7-8 hours.