This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX300S, 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 SI200AX300S
The AirTAC SI200 Standard Cylinder SI200AX300S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 300mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX300S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke300 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX300S
- 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 SI200AX300S
The AirTAC SI200AX300S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 300 mm stroke. It delivers 15708 N of push force at 0.5 MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI200AX300S, a direct upgrade sharing the exact ISO 15552 mounting interface, stroke, output force, and accessories.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This SI200AX300S variant uses a SUS420J2 stainless steel rod and includes a magnet for CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200AX300S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX300S |
| Bore size | Ø200 mm |
| Stroke | 300 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 SAI200AX300S 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 SAI200AX300S 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 SI200AX300S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×300 | 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 SI200AX300S Is Used
Heavy Press Forming
Generates up to 21991 N at 0.7 MPa for forming and stamping thick metal components in automated fabrication lines.
Injection Mold Clamping
Provides the high clamping thrust required to hold large industrial molds securely closed during plastic injection cycles.
Replacing the Airtac SI200 Standard Cylinder SI200AX300S with the SAI200AX300S
To replace the discontinued SI200AX300S, order the SAI200AX300S. Verify your ISO 15552 mounting fixture, 300 mm stroke requirement, G3/4 port, and M36x2 rod thread. The built-in magnet (-S) allows legacy CS1-B/DS1-B sensors to function, though the SAI family uses current AirTAC switches. If your application needs less force, a 160 mm bore provides 10053 N push at 0.5 MPa; if more force is needed, this 200 mm bore maxes out at 3204 kgf. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 300 mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX300S
- ✓ 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 SI200AX300S FAQ
Yes, the SI200AX300S is discontinued. The direct replacement is the SAI200AX300S. It is dimensionally interchangeable per ISO 15552, matching the 200 mm bore, 300 mm stroke, force, G3/4 port, and mounting interface.
At 0.5 MPa it pushes 15708 N and pulls 15080 N. At 0.7 MPa it pushes 21991 N, and 28274 N at 0.9 MPa. The theoretical max force is 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX300S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX300S replacement — usually within 7-8 hours.