This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X500TC, 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.

The AirTAC SI200 Standard Cylinder SI200X500TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 500mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X500TC, which matches its ISO interface, bore, stroke, force and mounting.
The AirTAC SI200X500TC is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 500mm stroke. Delivering 15708 N push force at 0.5 MPa via a G3/4 port, it is replaced by the SAI200X500TC. This direct successor shares the exact TC trunnion mounting, M36x2 thread, and dimensions, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and longevity. Without a magnet (-S), this SKU cannot take a sensor. For high heat, Viton H seals raise the temperature limit to 150 C.
| Model | Airtac SI200 Standard Cylinder SI200X500TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X500TC |
| Bore size | Ø200 mm |
| Stroke | 500 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 SAI200X500TC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
The SAI200X500TC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×500 | 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).
Drives large presses and stamping dies requiring 15708 N thrust at 0.5 MPa.
Secures oversized fabrication parts in welding jigs with a 3204 kgf maximum hold.
To replace the SI200X500TC, order the SAI200X500TC, confirming the ISO 15552 TC trunnion mount, 500mm stroke, and G3/4 port. The SAI family also adds SAIL (air-released lock), SAIF (valve), and BSAI (clamp-lock) variants the SI lacked. If downsizing, neighbor bores offer less force; a 160mm bore yields 10053 N push at 0.5 MPa. Note: a plain cylinder drifts on air loss—the cushion only decelerates. Use an external rod lock or pilot check valve for holding. At 500mm stroke, use external guides to prevent rod bending and side loads. This SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Replacement checklist
Yes, the SI200X500TC is discontinued. The direct replacement is the SAI200X500TC, which matches the 200mm bore, 500mm stroke, G3/4 port, and ISO 15552 TC mounting interface.
At 0.5 MPa it pushes 15708 N and pulls 15080 N. At 0.7 MPa push is 21991 N, and max theoretical force is 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s. It uses a 40mm rod, M36x2 thread, and 50mm cushions.
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X500TC replacement — usually within 7-8 hours.