This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX185, 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 SI200AX185
The AirTAC Airtac SI200 Standard Cylinder SI200AX185 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 185mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX185, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke185 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX185
- 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 SI200AX185
The AirTAC SI200AX185 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 185 mm stroke. It delivers 15708 N push force at 0.5 MPa through its G3/4 port. AirTAC replaced this legacy unit with the SAI200AX185, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size to fit existing fixtures seamlessly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This specific SKU uses a SUS420J2 stainless steel rod (the -A option) and lacks a magnet, meaning it cannot accept legacy CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200AX185 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX185 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX185 |
| Bore size | Ø200 mm |
| Stroke | 185 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 SAI200AX185 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 SAI200AX185 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 SI200AX185
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×185 | 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 SI200AX185 Is Used
Heavy Stamp Pressing
Provides the massive 15708 N push force at 0.5 MPa required for forming and stamping thick metal components in automated fabrication lines.
Industrial Clamp Systems
Secures large molds or heavy workpieces during machining, utilizing the robust 40 mm SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI200 Standard Cylinder SI200AX185 with the SAI200AX185
To replace the discontinued SI200AX185, order the SAI200AX185. Confirm the ISO 15552 mounting interface, the 200 mm bore, 185 mm stroke, G3/4 port (available in PT, G, or NPT), and your specific mounting accessory (LB, FA, CA, TC, etc.). Because this SKU lacks the -S magnet, it cannot support position sensing; if sensing is required, switch to an SAI equivalent with the S suffix for current AirTAC switches. When sizing, note that dropping to a 160 mm bore reduces push force to 10053 N at 0.5 MPa, while increasing pressure to 0.7 MPa yields 21991 N. A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. The -A rod specifies SUS420J2 stainless steel for corrosion resistance.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX185
- ✓ 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 SI200AX185 FAQ
Yes, the SI200AX185 is discontinued. The direct replacement is the SAI200AX185. It is dimensionally interchangeable per ISO 15552, maintaining the same 200 mm bore, 185 mm stroke, output force, G3/4 port, and mounting interface to fit existing fixtures.
This double-acting cylinder features a G3/4 air port and an M36x2 rod thread. It delivers 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. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX185
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX185 replacement — usually within 7-8 hours.