This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X550S, 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 SI200X550S
The AirTAC SI200 Standard Cylinder SI200X550S 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 SAI200X550S, 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 → SAI200X550S
- 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 SI200X550S
The AirTAC SI200X550S 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, its production has ended. The direct replacement is the SAI200X550S, matching the interface, bore, stroke, force, port and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family adds SAIL lock, SAIF valve and BSAI clamp variants the SI lacked. This -S SKU uses CS1-B/DS1-B sensors; the SAI takes current switches.
Airtac SI200 Standard Cylinder SI200X550S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X550S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X550S |
| 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 SAI200X550S 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 SAI200X550S 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 SI200X550S
| 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 SI200X550S Is Used
Heavy Press Clamping
Generates 15708 N at 0.5 MPa to secure large fabricated steel components during heavy industrial pressing and forming operations.
Pallet Lift Actuation
Drives robust vertical lifting arms in automated high-bay warehouses, safely moving loads up to the 801 kg vertical-lift threshold.
Large Mold Ejection
Provides the long 550mm stroke and high output force required to push heavy industrial injection molds or cast parts safely out of machinery.
Replacing the Airtac SI200 Standard Cylinder SI200X550S with the SAI200X550S
To replace the SI200X550S, order the SAI200X550S. Confirm the ISO 15552 mounting interface, 200mm bore, 550mm stroke, G3/4 port (PT/G/NPT), M36x2 thread, and the -S magnet. Sizing both ways: a 160mm bore yields 10053 N [email protected], while a 200mm bore hits 21991 N at 0.7 MPa. With a 550mm stroke, use external guides to prevent rod-bending side loads. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X550S
- ✓ 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 SI200X550S FAQ
Yes, the AirTAC SI200X550S is discontinued. The direct replacement is the SAI200X550S. It is dimensionally interchangeable per ISO 15552, retaining the exact same 200mm bore, 550mm stroke, output force, G3/4 port and mounting accessories.
The 200mm bore delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and 28274 N push at 0.9 MPa. The theoretical max force is 3204 kgf at 1.0 MPa. Operating speed for this bore size is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X550S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X550S replacement — usually within 7-8 hours.