This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX400, 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 SI200AX400
The AirTAC Airtac SI200 Standard Cylinder SI200AX400 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 SAI200AX400, 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 → SAI200AX400
- 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 SI200AX400
The AirTAC SI200AX400 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 via a G3/4 port, it is replaced by the SAI200AX400 direct. The SAI uses an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life. This non-magnet SKU cannot take a switch, and the -A rod is SUS420J2 stainless.
The SAI family also adds SAIL and BSAI lock variants absent in the SI line. Note that a plain cylinder drifts on air loss; the cushion only decelerates.
Airtac SI200 Standard Cylinder SI200AX400 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX400 |
| 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 SAI200AX400 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 SAI200AX400 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 SI200AX400
| 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 SI200AX400 Is Used
Heavy Machinery Forming
Drives large presses and forming tools requiring massive output, utilizing the 21991 N push force at 0.7 MPa to shape thick metal components.
Large Mold Clamping
Secures oversized injection molds or heavy fixtures during manufacturing, relying on the robust 40mm SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI200 Standard Cylinder SI200AX400 with the SAI200AX400
To replace the SI200AX400, order the SAI200AX400. It is dimensionally interchangeable per ISO 15552, matching the 200mm bore, 400mm stroke, M36x2 thread, 50mm cushion, G3/4 port, and mounting. Because this is a non-S SKU, it cannot accept a CS1-B/DS1-B sensor. If you need to hold a load without live air, use an external pilot check valve or the SAIL/BSAI lock variant, as the cushion only decelerates. For sizing, the 15708 N push at 0.5 MPa yields a 9425 N safe load (801 kg vertical lift). A smaller 160mm bore offers 10053 N. Finally, at 400mm stroke, use external guides to prevent rod bending from side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX400
- ✓ 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 SI200AX400 FAQ
Yes, the AirTAC SI200AX400 is discontinued. The direct replacement is the SAI200AX400. It features the same ISO 15552 mounting interface, 200mm bore, 400mm stroke, G3/4 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
The 200mm bore features a G3/4 port. It delivers 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. The speed range is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX400 replacement — usually within 7-8 hours.