This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X320S, 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 SI200X320S
The AirTAC Airtac SI200 Standard Cylinder SI200X320S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 320mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X320S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke320 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X320S
- 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 SI200X320S
The AirTAC SI200X320S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 320mm stroke. It delivers 15708 N push force at 0.5 MPa. The direct replacement is the SAI200X320S, matching the bore, stroke, G3/4 port and ISO 15552 mounting interface. The SAI upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure and long life.
The -S suffix means a piston magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). A plain cylinder drifts on air loss; the cushion only decelerates. For holding, use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI200 Standard Cylinder SI200X320S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X320S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X320S |
| Bore size | Ø200 mm |
| Stroke | 320 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 SAI200X320S 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 SAI200X320S 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 SI200X320S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×320 | 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 SI200X320S Is Used
Heavy Press Systems
Drives large forming presses requiring 21991 N push at 0.7 MPa, utilizing the adjustable 50mm cushion to halt heavy masses smoothly.
Large Mold Handling
Actuates heavy injection molds over 320mm, where the G3/4 port ensures rapid fill and exhaust for 30-500 mm/s speeds.
Replacing the Airtac SI200 Standard Cylinder SI200X320S with the SAI200X320S
To replace the SI200X320S, order the SAI200X320S. Confirm the ISO 15552 mounting interface, 320mm stroke, G3/4 port, and mounting accessory. The -S magnet is retained. If you need less force, a 160mm bore gives 10053 N push at 0.5 MPa; if you need more, there is no larger standard bore. Because this is a 320mm stroke, prevent rod bending by using external guides to absorb side loads. The standard cylinder does not hold load without air; add a pilot check valve or explore the SAIL or BSAI lock variants. The SAI family also adds the SAIF valve option for smaller bores.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X320S
- ✓ 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 SI200X320S FAQ
Yes, the SI200X320S is discontinued. The direct replacement is the SAI200X320S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 320mm stroke, output force, G3/4 port and mounting fixtures.
The SI200X320S provides 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. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X320S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X320S replacement — usually within 7-8 hours.