This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X550, 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 SI200X550
The AirTAC SI200 Standard Cylinder SI200X550 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 550mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X550, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke550 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X550
- 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 SI200X550
The AirTAC SI200X550 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 550mm stroke. Delivering 15708 N push force at 0.5 MPa via a G3/4 port, it is replaced by the SAI200X550 direct upgrade. The SAI retains identical ISO 15552 mounting-interface dimensions, bore, stroke, force, and port, fitting existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a magnet and cannot take a sensor; legacy -S versions used CS1-B/DS1-B switches. For high heat, Viton H seals raise the temperature limit to 150 C.
Airtac SI200 Standard Cylinder SI200X550 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X550 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X550 |
| Bore size | Ø200 mm |
| Stroke | 550 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 SAI200X550 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 SAI200X550 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 SI200X550
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×550 | 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 SI200X550 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa with robust 50mm adjustable end cushions.
Large Mold Clamping
Secures oversized injection molds using the 3204 kgf maximum theoretical force at 1.0 MPa operating pressure.
Replacing the Airtac SI200 Standard Cylinder SI200X550 with the SAI200X550
To replace the SI200X550, order the SAI200X550. Confirm the ISO 15552 mounting interface, 200mm bore, 550mm stroke, G3/4 port (PT/G/NPT thread), and mounting accessory (LB, FA, CA, TC). This non-magnet SKU cannot accept a sensor. Sizing both ways: a 160mm bore yields 10053 N push at 0.5 MPa, while the 200mm 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, pilot check valve, or the SAIL/BSAI lock variant for held loads. At 550mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X550
- ✓ 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 SI200X550 FAQ
Yes, the AirTAC SI200X550 is discontinued. The direct replacement is the SAI200X550. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 550mm stroke, 15708 N force, G3/4 port, and mounting interface.
This double-acting cylinder uses a G3/4 air port. 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X550
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X550 replacement — usually within 7-8 hours.