This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X400, 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 SI200X400
The AirTAC Airtac SI200 Standard Cylinder SI200X400 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 SAI200X400, 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 → SAI200X400
- 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 SI200X400
The AirTAC SI200X400 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 SAI200X400. This direct upgrade retains the exact ISO 15552 mounting interface, bore, stroke, force, port and mounting accessories.
The SAI200X400 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a magnet (-S) and cannot accept a CS1-B/DS1-B sensor. The SAI family also adds SAIL and BSAI lock variants absent in the SI line.
Airtac SI200 Standard Cylinder SI200X400 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X400 |
| 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 SAI200X400 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 SAI200X400 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 SI200X400
| 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 SI200X400 Is Used
Heavy Stamp Pressing
Drives large metal forming and stamping dies requiring 15708 N of push force at 0.5 MPa.
Pallet Handling
Indexes heavy loaded pallets over a 400mm travel distance using external guides to prevent rod bending.
Industrial Clamp Actuation
Secures massive fabricated components during machining, relying on a pilot check valve to hold the load.
Replacing the Airtac SI200 Standard Cylinder SI200X400 with the SAI200X400
To replace the SI200X400, order the SAI200X400. Verify your ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 400mm stroke, and the G3/4 port (PT/G/NPT threads). Because this SKU has no -S magnet, it cannot support position sensing; order a magnet-equipped SAI if you need switches. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify a SAIL/BSAI lock variant. At 400mm stroke, prevent rod bending by guiding the load externally. If downsizing, a 160mm bore yields 10053 N push at 0.5 MPa; if upsizing is impossible, 1.0 MPa yields 3204 kgf max.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X400
- ✓ 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 SI200X400 FAQ
Yes, the AirTAC SI200X400 is discontinued. The direct replacement is the SAI200X400. It shares the same ISO 15552 mounting interface, 200mm bore, 400mm stroke, output force, G3/4 port, and accessories, fitting directly into existing fixtures.
The G3/4 ported 200mm bore 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 3204 kgf maximum at 1.0 MPa. It operates at 30-500 mm/s with a 50mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X400
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X400 replacement — usually within 7-8 hours.