This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX50, 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 SI200BX50
The AirTAC Airtac SI200 Standard Cylinder SI200BX50 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 SAI200BX50, 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 → SAI200BX50
- 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 SI200BX50
The AirTAC SI200BX50 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 50 mm stroke. Built with an extruded aluminum barrel and adjustable air cushions at both ends, it delivers 15708 N of push force at 0.5 MPa. The direct replacement is the SAI200BX50, which preserves the original G3/4 port, M36x2 rod thread, and ISO 15552 mounting interface for a seamless fixture swap.
Upgrading to the SAI200BX50 introduces an upgraded piston seal featuring two Y-shaped one-way elements for low start-up pressure and extended life. This SKU has a SUS304 stainless steel rod (option B) for corrosion resistance but lacks a magnet, meaning it cannot accept CS1-B or DS1-B sensors.
Airtac SI200 Standard Cylinder SI200BX50 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX50 |
| 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 SAI200BX50 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 SAI200BX50 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 SI200BX50
| 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 SI200BX50 Is Used
Heavy Stamp Pressing
Drives large metal forming and stamping dies requiring up to 3204 kgf of theoretical maximum force at 1.0 MPa.
Industrial Clamp Systems
Secures heavy structural fabrications during welding or machining using the robust 40 mm SUS304 stainless rod.
Massive Platen Actuation
Moves large molding platens or press beds over a short 50 mm distance with a 15708 N working push at 0.5 MPa.
Replacing the Airtac SI200 Standard Cylinder SI200BX50 with the SAI200BX50
To replace the discontinued SI200BX50, order the SAI200BX50 and verify your ISO 15552 mounting interface, 200 mm bore, 50 mm stroke, and G3/4 port. Because this configuration lacks the -S magnet, it cannot support position sensing; if switches are required, select an SAI equivalent with the magnet option and use current AirTAC switches. If your application requires load holding on air loss, note that the air cushion only decelerates the piston and does not lock it; you will need an external rod lock, a pilot-operated check valve, or the SAIL/BSAI lock variants. For sizing alternatives, dropping to a 160 mm bore reduces the push force to 10053 N at 0.5 MPa, while staying at 200 mm and increasing pressure to 0.7 MPa yields 21991 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX50
- ✓ 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 SI200BX50 FAQ
Yes, the SI200BX50 is discontinued. The direct replacement is the SAI200BX50. It is dimensionally interchangeable per ISO 15552, retaining the exact same 200 mm bore, 50 mm stroke, G3/4 port, and mounting accessories.
It features a G3/4 air port. The force output is 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and a theoretical maximum of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX50
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX50 replacement — usually within 7-8 hours.