This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX350, 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 SI200AX350
The AirTAC SI200 Standard Cylinder SI200AX350 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 350mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX350, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke350 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX350
- 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 SI200AX350
The AirTAC SI200AX350 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 350 mm stroke. Delivering 15708 N of push force at 0.5 MPa, it is superseded by the direct replacement SAI200AX350. This replacement shares the exact ISO 15552 mounting interface, 350 mm stroke, output force, G3/4 port, and M36x2 rod thread, fitting existing fixtures perfectly. The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because this specific SKU lacks the -S magnet suffix, it cannot accept a position sensor like the legacy CS1-B or DS1-B switches.
The SAI family also introduces variants the original SI line lacked, including the SAIL air-released lock, the SAIF built-in 4M valve, and the BSAI clamp-lock. Note that a standard cylinder will drift if air pressure is lost; the 50 mm adjustable air cushions only decelerate the piston near stroke ends rather than holding the load.
Airtac SI200 Standard Cylinder SI200AX350 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX350 |
| Bore size | Ø200 mm |
| Stroke | 350 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 SAI200AX350 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 SAI200AX350 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 SI200AX350
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×350 | 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 SI200AX350 Is Used
Heavy Pressing
Drives large stamping and forming presses requiring 15708 N of thrust at 0.5 MPa, utilizing the 350 mm stroke to cycle heavy tooling.
Automated Clamping
Secures large fabricated steel structures during welding or machining, applying up to 28274 N of clamping force at 0.9 MPa.
Replacing the Airtac SI200 Standard Cylinder SI200AX350 with the SAI200AX350
To replace the discontinued SI200AX350, order the SAI200AX350. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the 200 mm bore, the 350 mm stroke, and the G3/4 air port. This non-magnetic SKU cannot support switches; if sensing is required, select an SAI equivalent with the -S suffix to use current AirTAC switches. If you need to adjust force, the neighbouring 160 mm bore yields 10053 N push at 0.5 MPa, while the 200 mm bore hits 21991 N at 0.7 MPa. For load holding on air loss, a plain cylinder drifts, so specify an external pilot check valve, a rod lock, or the SAIL/BSAI lock variant. Finally, with a 350 mm stroke, prevent rod bending by guiding the load externally to avoid side-loading the piston.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX350
- ✓ 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 SI200AX350 FAQ
Yes, the SI200AX350 is discontinued. The direct replacement is the SAI200AX350. It is dimensionally interchangeable per ISO 15552, matching the 200 mm bore, 350 mm stroke, force, G3/4 port, and mounting interface.
It features a G3/4 air port and a 40 mm rod. Force output is 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and 28274 N push at 0.9 MPa. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX350
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX350 replacement — usually within 7-8 hours.