This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X375S, 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 SI200X375S
The AirTAC SI200 Standard Cylinder SI200X375S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 375mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X375S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke375 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X375S
- 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 SI200X375S
The AirTAC SI200X375S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 375mm stroke. Generating 15708 N push force at 0.5 MPa, it features a G3/4 port and M36x2 rod thread. AirTAC replaced this legacy unit with the SAI200X375S, a direct replacement matching the ISO 15552 mounting interface, bore, output force, and port size exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This -S model includes a piston magnet for CS1-B/DS1-B switches, and seal options like Viton H extend the temperature range up to 150 C.
Airtac SI200 Standard Cylinder SI200X375S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X375S |
| Bore size | Ø200 mm |
| Stroke | 375 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 SAI200X375S 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 SAI200X375S 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 SI200X375S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×375 | 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 SI200X375S Is Used
Heavy Press Systems
Drives large stamping and forming presses requiring 21991 N of push force at 0.7 MPa to shape thick metal plates.
Pallet Transfer
Indexes heavy loaded pallets along conveyor lines, utilizing the 375mm stroke to push loads securely between stations.
Replacing the Airtac SI200 Standard Cylinder SI200X375S with the SAI200X375S
To replace the SI200X375S, order the SAI200X375S and confirm your ISO 15552 mounting interface, 375mm stroke, G3/4 port, and M36x2 thread. Because this is a 375mm stroke, you must use external guides to prevent rod bending and side-load damage. If you need to size both ways, neighboring bores are 160mm and 125mm. At 0.5 MPa this 200mm bore yields 15708 N push and 15080 N pull. Remember that a plain cylinder drifts on air loss—the 50mm adjustable cushion only decelerates near stroke end. For load holding, specify an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. The SAI family also adds the SAIF self-valve variant, though only for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X375S
- ✓ 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 SI200X375S FAQ
Yes, the SI200X375S is discontinued. The direct replacement is the AirTAC SAI200X375S. It is dimensionally interchangeable per ISO 15552, matching the 200mm bore, 375mm stroke, G3/4 port, and mounting fixtures exactly.
The G3/4 port feeds a 40mm rod. 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; with a theoretical max of 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X375S replacement — usually within 7-8 hours.