This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X55S, 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 SI200X55S
The AirTAC SI200 Standard Cylinder SI200X55S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 55mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X55S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke55 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X55S
- 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 SI200X55S
The AirTAC SI200X55S is a discontinued double-acting ISO 15552 profile cylinder. Delivering 15708 N push force at 0.5 MPa through a 200 mm bore, it is replaced by the SAI200X55S. This direct successor shares the exact ISO 15552 mounting interface, 55 mm stroke, G3/4 port, and output force. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
The SAI family also introduces lock and valve variants the SI lacked, such as the SAIL and BSAI clamp-lock. This -S model includes a piston magnet for CS1-B/DS1-B sensors, though the SAI replacement uses current AirTAC switches.
Airtac SI200 Standard Cylinder SI200X55S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X55S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X55S |
| Bore size | Ø200 mm |
| Stroke | 55 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 SAI200X55S 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 SAI200X55S 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 SI200X55S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×55 | 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 SI200X55S Is Used
Heavy Press Forming
Generates up to 3204 kgf at 1.0 MPa for stamping and forming thick metal components in automotive assembly lines.
Pallet Transfer
Provides the robust 15708 N push force needed to index heavy loaded pallets smoothly between conveyor zones.
Injection Molding
Handles substantial mold extraction duties, using its 50 mm adjustable air cushions to decelerate massive loads safely.
Replacing the Airtac SI200 Standard Cylinder SI200X55S with the SAI200X55S
To replace the SI200X55S, order the SAI200X55S. Verify the ISO 15552 mounting interface, 200 mm bore, 55 mm stroke, G3/4 port (PT/G/NPT), and mounting accessory. The -S suffix means a magnet is present for position sensing. If downsizing, a 160 mm bore yields 10053 N push at 0.5 MPa; if upsizing is impossible, note the 200 mm bore hits 21991 N at 0.7 MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify the SAIL/BSAI lock variant. Rod material options include carbon steel, SUS420J2 (A), or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X55S
- ✓ 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 SI200X55S FAQ
Yes, the SI200X55S is discontinued. The direct replacement is the SAI200X55S. It is dimensionally interchangeable per ISO 15552, matching the 200 mm bore, 55 mm stroke, output force, G3/4 port, and mounting fixtures.
At 0.5 MPa it pushes 15708 N and pulls 15080 N. At 0.7 MPa push is 21991 N, and at 0.9 MPa it is 28274 N. 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 SAI200X55S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X55S replacement — usually within 7-8 hours.