This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X650S, 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 SI200X650S
The AirTAC SI200 Standard Cylinder SI200X650S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 650mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X650S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke650 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X650S
- 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 SI200X650S
The AirTAC SI200X650S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 650 mm stroke. Delivering 15708 N push force at 0.5 MPa, it features a G3/4 port and M36x2 rod thread. AirTAC replaced this legacy unit with the SAI200X650S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding, the SAI family adds SAIL and BSAI lock variants the SI lacked. With the -S magnet, this model supports CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200X650S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X650S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X650S |
| Bore size | Ø200 mm |
| Stroke | 650 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 SAI200X650S 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 SAI200X650S 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 SI200X650S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×650 | 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 SI200X650S Is Used
Heavy Machinery Forming
Drives large presses and forming tools requiring up to 15708 N of push force at 0.5 MPa, utilizing the 650 mm stroke for deep draw operations.
Oversized Part Indexing
Transitions large fabricated structural members along assembly lines, relying on the 50 mm adjustable air cushions to decelerate heavy moving masses smoothly.
Replacing the Airtac SI200 Standard Cylinder SI200X650S with the SAI200X650S
To replace the discontinued SI200X650S, order the SAI200X650S. Verify your existing fixture's ISO 15552 mounting interface, 200 mm bore, 650 mm stroke, G3/4 port, and accessory type. The -S suffix means a magnet is present for CS1-B/DS1-B switches; if ordering the SAI, specify current AirTAC sensors. If sizing down, neighbor bores offer less force (160 mm provides 10053 N push at 0.5 MPa). For load holding, note that 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. Because the 650 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load damage. Operating speed is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X650S
- ✓ 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 SI200X650S FAQ
Yes, the SI200X650S is discontinued. The direct replacement is the AirTAC SAI200X650S. It shares the identical ISO 15552 mounting interface, 200 mm bore, 650 mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
This double-acting cylinder uses a G3/4 air port. At 0.5 MPa it provides 15708 N push and 15080 N pull force. At 0.7 MPa push is 21991 N, and at 0.9 MPa it is 28274 N. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X650S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X650S replacement — usually within 7-8 hours.