This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X350, 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 SI200X350
The AirTAC SI200 Standard Cylinder SI200X350 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 350mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X350, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke350 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X350
- 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 SI200X350
The AirTAC SI200X350 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 350 mm stroke. It delivers 15708 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI200X350, matching the exact ISO 15552 mounting interface, bore, stroke, force and port size.
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, so it cannot accept a sensor; the legacy SI used CS1-B/DS1-B switches. For high heat, Viton H seals raise the temperature limit to 150 C.
Airtac SI200 Standard Cylinder SI200X350 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X350 |
| Bore size | Ø200 mm |
| Stroke | 350 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 SAI200X350 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 SAI200X350 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 SI200X350
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×350 | 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 SI200X350 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa, utilizing the adjustable 50 mm cushion to absorb high kinetic energy.
Automotive Assembly Jig
Actuates massive clamping arms on automotive fixturing where the 3204 kgf maximum theoretical force secures heavy chassis components during welding.
Replacing the Airtac SI200 Standard Cylinder SI200X350 with the SAI200X350
To replace the discontinued SI200X350, order the SAI200X350. Confirm the ISO 15552 mounting interface, the 350 mm stroke, the M36x2 rod thread and the G3/4 port. Because this non-magnet SKU cannot take a sensor, if position detection is needed you must source a compatible SAI variant with a magnet. Sizing both ways: the neighboring 160 mm bore yields 10053 N push at 0.5 MPa, while the 200 mm bore hits 21991 N at 0.7 MPa. A plain cylinder drifts on air loss—the 50 mm cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. With a 350 mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X350
- ✓ 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 SI200X350 FAQ
Yes, the AirTAC SI200X350 is discontinued. The direct replacement is the SAI200X350. It is a true ISO 15552 profile cylinder that matches the original 200 mm bore, 350 mm stroke, 15708 N force, G3/4 port and mounting interface, dropping directly into existing fixtures.
At 0.5 MPa it pushes with 15708 N and pulls with 15080 N. At 0.7 MPa it pushes 21991 N, at 0.9 MPa 28274 N, and the theoretical max is 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s. The G3/4 port and M36x2 rod thread are fixed by the 200 mm bore.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X350
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X350 replacement — usually within 7-8 hours.