This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X50S, 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 SI200X50S
The AirTAC SI200 Standard Cylinder SI200X50S 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 SAI200X50S, 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 → SAI200X50S
- 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 SI200X50S
The AirTAC SI200X50S is a discontinued double-acting ISO 15552 profile cylinder, delivering a substantial 15708 N push force at 0.5 MPa through its 200 mm bore and 50 mm stroke. As an end-of-line product, it is directly superseded by the SAI200X50S. This direct successor preserves the exact G3/4 port, M36x2 rod thread, 50 mm cushions, and ISO 15552 mounting interface, fitting legacy fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also expands functionality with SAIL, SAIF, and BSAI lock variants the original SI lacked. This -S model includes a piston magnet for CS1-B/DS1-B switches, while the SAI replacement utilizes current AirTAC sensors.
Airtac SI200 Standard Cylinder SI200X50S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X50S |
| 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 SAI200X50S 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 SAI200X50S 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 SI200X50S
| 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 SI200X50S Is Used
Heavy Stamping Press
Drives large platens in metal forming, utilizing the 15708 N push force at 0.5 MPa to deform thick sheet stock reliably.
Mold Clamping Station
Secures heavy injection mold halves using the 15080 N pull force, ensuring rigid alignment during high-pressure resin injection.
Replacing the Airtac SI200 Standard Cylinder SI200X50S with the SAI200X50S
To replace the discontinued SI200X50S, order the SAI200X50S, confirming the ISO 15552 mounting interface, 200 mm bore, 50 mm stroke, G3/4 port (PT/G/NPT), and the -S magnet for position sensing. When sizing, note this class yields 15708 N push at 0.5 MPa; a smaller 160 mm bore offers 10053 N, while boosting pressure to 0.7 MPa increases the 200 mm output to 21991 N. A plain cylinder drifts on air loss since cushions only decelerate; for load holding, specify an external pilot check valve or the SAIL/BSAI lock variant. Despite the short 50 mm stroke, verify side-load alignment to prevent rod bending on heavy 200 mm assemblies.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X50S
- ✓ 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 SI200X50S FAQ
Yes, the AirTAC SI200X50S is discontinued. The direct replacement is the SAI200X50S. It features the same ISO 15552 mounting interface, 200 mm bore, 50 mm stroke, output force, G3/4 port, and accessories, fitting existing fixtures perfectly.
This double-acting cylinder features 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 28274 N at 0.9 MPa. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X50S replacement — usually within 7-8 hours.