This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX350S, 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 SI200AX350S
The AirTAC SI200 Standard Cylinder SI200AX350S 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 SAI200AX350S, 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 → SAI200AX350S
- 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 SI200AX350S
The AirTAC SI200AX350S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 350mm stroke. Delivering 15708 N push force at 0.5 MPa, it features a SUS420J2 stainless piston rod, a built-in magnet for CS1-B/DS1-B sensors, and a G3/4 air port. AirTAC replaced this legacy unit with the SAI200AX350S.
The SAI200AX350S is a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, and force. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Note that plain cylinders drift without live air; use the SAIL or BSAI lock variants for hold.
Airtac SI200 Standard Cylinder SI200AX350S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX350S |
| 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 SAI200AX350S 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 SAI200AX350S 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 SI200AX350S
| 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 SI200AX350S Is Used
Heavy Stamping
Drives large presses and stamping dies requiring 15708 N of push force at 0.5 MPa with robust 350mm travel.
Automated Assembly
Actuates massive industrial fixtures using the SUS420J2 stainless rod to resist corrosion in harsh plants.
Replacing the Airtac SI200 Standard Cylinder SI200AX350S with the SAI200AX350S
To replace the SI200AX350S, order the SAI200AX350S. Confirm the ISO 15552 mounting interface, the 350mm stroke, the G3/4 port, and the -S magnet for current AirTAC switches. Sizing both ways: this 200mm bore yields 15708 N at 0.5 MPa, while a neighbouring 160mm bore provides 10053 N. If downsizing, verify your force needs. Because the stroke is 350mm, add external guides to prevent rod-bending under side loads. A plain cylinder does not hold load on air loss; the cushion only decelerates. For secure holding, specify the SAIL air-released lock, the BSAI clamp-lock, or an external pilot check valve. The Viton H seal option raises temperature limits to 150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX350S
- ✓ 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 SI200AX350S FAQ
Yes, the AirTAC SI200AX350S is discontinued. The direct replacement is the SAI200AX350S. It shares the identical ISO 15552 mounting interface, 200mm bore, 350mm stroke, force, and G3/4 port, fitting existing fixtures perfectly while adding an upgraded piston seal.
It features a G3/4 air port. The force ratings are: 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 maximum of 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX350S replacement — usually within 7-8 hours.