This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X50STC, 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 SI200X50STC
The AirTAC Airtac SI200 Standard Cylinder SI200X50STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 50mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X50STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke50 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X50STC
- 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 SI200X50STC
The AirTAC SI200X50STC is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 50 mm stroke. It delivers 15708 N push force at 0.5 MPa via a G3/4 port. The direct replacement is the SAI200X50STC, which matches the interface, TC trunnion mount, stroke and force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with CS1-B/DS1-B sensors, and Viton H seals raise the temperature range to 150 C.
Airtac SI200 Standard Cylinder SI200X50STC Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X50STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X50STC |
| Bore size | Ø200 mm |
| Stroke | 50 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 SAI200X50STC 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 SAI200X50STC 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 SI200X50STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×50 | 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 SI200X50STC Is Used
Heavy Press Forming
Drives large stamping and forming presses requiring sustained 15708 N push force at 0.5 MPa.
Industrial Clamp
Secures large fabricated components during machining using the robust TC trunnion mount.
Replacing the Airtac SI200 Standard Cylinder SI200X50STC with the SAI200X50STC
To replace the SI200X50STC, order the SAI200X50STC. Confirm the ISO 15552 TC trunnion mounting, 200 mm bore, 50 mm stroke, G3/4 port and the -S magnet for current AirTAC switches. If you need less force, the 160 mm bore offers 10053 N push at 0.5 MPa; if you need more, note the 200 mm bore maxes at 3204 kgf at 1.0 MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF valve variant is unavailable for this 200 mm bore.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X50STC
- ✓ 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 SI200X50STC FAQ
Yes, the SI200X50STC is discontinued. The direct replacement is the SAI200X50STC. It is dimensionally interchangeable per ISO 15552, matching the 200 mm bore, 50 mm stroke, G3/4 port, TC mount and output force.
At 0.5 MPa it pushes 15708 N and pulls 15080 N. At 0.7 MPa push is 21991 N, and the theoretical max is 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s, the rod is 40 mm with an M36x2 thread, and it has a 50 mm cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X50STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X50STC replacement — usually within 7-8 hours.