This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX375S, 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 SI200AX375S
The AirTAC SI200 Standard Cylinder SI200AX375S 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 SAI200AX375S, 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 → SAI200AX375S
- 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 SI200AX375S
The AirTAC SI200AX375S is a discontinued double-acting ISO 15552 profile cylinder featuring a 200mm bore and 375mm stroke. Delivering 15708 N push force at 0.5 MPa, it uses a G3/4 port and an SUS420J2 stainless piston rod. The direct replacement is the SAI200AX375S, matching the interface, bore, stroke, force, port, and mounting.
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 absent in the SI line. Your -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200AX375S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX375S |
| 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 SAI200AX375S 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 SAI200AX375S 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 SI200AX375S
| 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 SI200AX375S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa, utilizing the adjustable 50mm air cushions to absorb high kinetic energy.
Large Mold Handling
Shifts heavy industrial molds into machining centers, taking advantage of the SUS420J2 stainless rod for corrosion resistance in humid foundry environments.
Replacing the Airtac SI200 Standard Cylinder SI200AX375S with the SAI200AX375S
To replace the SI200AX375S, order the SAI200AX375S. Confirm the ISO 15552 mounting interface, the 375mm stroke, the G3/4 port, and your specific mounting accessory. The -A rod denotes SUS420J2 stainless steel, and the -S indicates a magnet for CS1-B/DS1-B switches. Sizing both ways: a 160mm bore yields 10053 N push at 0.5 MPa, while a 200mm bore yields 21991 N at 0.7 MPa. At 375mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX375S
- ✓ 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 SI200AX375S FAQ
Yes, the SI200AX375S is discontinued. The direct replacement is the SAI200AX375S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 375mm stroke, G3/4 port, and mounting interface.
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 max of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX375S replacement — usually within 7-8 hours.