This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X35S, 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 SI200X35S
The AirTAC Airtac SI200 Standard Cylinder SI200X35S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 35mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X35S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke35 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X35S
- 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 SI200X35S
The AirTAC SI200X35S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 35mm stroke, delivering 15708 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI200X35S. The SAI is a direct replacement: it matches the exact ISO 15552 mounting interface, bore, stroke, output force, G3/4 port and accessories, dropping straight into existing fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The original SI line lacked the SAIL air-released lock, SAIF built-in valve and BSAI clamp-lock variants now available. This -S SKU has a piston magnet for CS1-B/DS1-B switches, while the SAI uses current AirTAC switches.
Airtac SI200 Standard Cylinder SI200X35S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X35S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X35S |
| Bore size | Ø200 mm |
| Stroke | 35 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 SAI200X35S 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 SAI200X35S 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 SI200X35S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×35 | 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 SI200X35S Is Used
Heavy Press Operations
Drives large forming and stamping presses requiring massive force, leveraging 21991 N at 0.7 MPa for robust industrial metalworking.
Industrial Actuation
Actuates large-scale process valves or heavy-duty diverters in material handling systems, relying on the 50mm adjustable cushion for smooth stops.
Replacing the Airtac SI200 Standard Cylinder SI200X35S with the SAI200X35S
To replace the SI200X35S, order the SAI200X35S and confirm the ISO 15552 mounting interface, 200mm bore, 35mm stroke, G3/4 port (PT/G/NPT thread) and mounting accessory. The -S suffix means a magnet is present for CS1-B/DS1-B sensors. Sizing both ways: a 160mm bore neighbour yields 10053 N push at 0.5 MPa, while stepping up is not required as this bore hits 3204 kgf max force at 1.0 MPa. A plain cylinder drifts on air loss; the cushion only decelerates. For held loads use the SAIL lock, BSAI clamp-lock variant, or an external rod lock. Rod material options include carbon steel, SUS420J2 (A) or SUS304 (B); Viton H seals raise heat to 150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X35S
- ✓ 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 SI200X35S FAQ
Yes, the AirTAC SI200X35S is discontinued. The direct replacement is the SAI200X35S. It shares the identical ISO 15552 mounting interface, 200mm bore, 35mm stroke, output force and G3/4 port, fitting existing fixtures perfectly.
This double-acting cylinder features a G3/4 air port and M36x2 rod thread. It 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 maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X35S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X35S replacement — usually within 7-8 hours.