This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX450S, 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 SI200AX450S
The AirTAC SI200 Standard Cylinder SI200AX450S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 450mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX450S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke450 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX450S
- 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 SI200AX450S
The AirTAC SI200AX450S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 450mm stroke, delivering 15708N push force at 0.5MPa. It features a SUS420J2 stainless piston rod and a G3/4 air port. AirTAC replaced this legacy unit with the SAI200AX450S, a direct replacement sharing the exact ISO 15552 mounting interface, bore, force and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked. This -S model has a magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches.
Airtac SI200 Standard Cylinder SI200AX450S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX450S |
| Bore size | Ø200 mm |
| Stroke | 450 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 SAI200AX450S 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 SAI200AX450S 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 SI200AX450S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×450 | 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 SI200AX450S Is Used
Heavy Press Systems
Drives large stamping and forming presses requiring up to 21991N thrust at 0.7MPa, utilizing the robust 40mm SUS420J2 rod.
Pallet Handling
Indexes heavy loaded pallets over 450mm cycles where the 801kg vertical lift capacity handles substantial packaging weights.
Industrial Automation
Executes 450mm linear shifts in large-scale material handling lines, relying on adjustable 50mm air cushions to decelerate loads.
Replacing the Airtac SI200 Standard Cylinder SI200AX450S with the SAI200AX450S
To replace the SI200AX450S, order the SAI200AX450S. Verify the ISO 15552 mounting interface, 450mm stroke, G3/4 port, and your specific mounting accessory. The -A suffix denotes a SUS420J2 stainless rod, and -S indicates a piston magnet for legacy CS1-B/DS1-B sensors. If downsizing, a 160mm bore yields 10053N push at 0.5MPa; if upsizing is impossible, note the theoretical max is 3204kgf at 1.0MPa. A plain cylinder drifts on air loss, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI variant. With a 450mm stroke, prevent rod bending by using an external guide to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX450S
- ✓ 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 SI200AX450S FAQ
Yes, the SI200AX450S is discontinued. The direct replacement is the SAI200AX450S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 450mm stroke, 15708N force, G3/4 port and mounting interface.
It uses a G3/4 air port. Force outputs are 15708N push and 15080N pull at 0.5MPa, 21991N push at 0.7MPa, 28274N push at 0.9MPa, and a theoretical max of 3204kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX450S replacement — usually within 7-8 hours.