This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX475, 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 SI200BX475
The AirTAC Airtac SI200 Standard Cylinder SI200BX475 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 475mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX475, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke475 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX475
- 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 SI200BX475
The AirTAC SI200BX475 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 475mm stroke, delivering 15708 N of push force at 0.5 MPa. AirTAC replaced this end-of-line unit with the SAI200BX475. It is a direct upgrade retaining the exact ISO 15552 mounting interface, 475mm stroke, G3/4 port, and 3204 kgf maximum force. The SAI family introduces an upgraded piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life.
This specific SKU features a SUS304 stainless steel piston rod for corrosion resistance and lacks a magnet, meaning it cannot accept legacy CS1-B/DS1-B sensors. Note that a plain cylinder drifts on air loss; for load holding you need an external rod lock or the SAIL/BSAI lock variants.
Airtac SI200 Standard Cylinder SI200BX475 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX475 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX475 |
| Bore size | Ø200 mm |
| Stroke | 475 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 SAI200BX475 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 SAI200BX475 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 SI200BX475
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×475 | 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 SI200BX475 Is Used
Heavy Press Systems
Drives large forming presses requiring up to 28274 N of thrust at 0.9 MPa, utilizing the 475mm stroke to cycle heavy tooling.
Automated Welding Clamps
Actuates robust clamping arms on large automotive fixtures where the SUS304 rod resists weld spatter and shop floor moisture.
Replacing the Airtac SI200 Standard Cylinder SI200BX475 with the SAI200BX475
To replace the discontinued SI200BX475, order the SAI200BX475. Verify your ISO 15552 mounting fixture, the 475mm stroke, and the G3/4 port. Because this SKU has no -S magnet, it cannot support position sensing; if sensing is required, switch to an SAI200BX475S model and use current AirTAC switches. When sizing, the 200mm bore yields 15708 N push at 0.5 MPa; dropping to a 160mm bore reduces push to 10053 N, while increasing pressure to 0.7 MPa yields 21991 N. With a 475mm stroke, prevent rod bending by guiding the load externally to avoid side-load forces. The air cushion only decelerates the load at stroke end and does not hold position—use a pilot check valve or the SAIL lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX475
- ✓ 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 SI200BX475 FAQ
Yes, the SI200BX475 is discontinued. The direct replacement is the SAI200BX475. It shares the identical ISO 15552 mounting interface, 200mm bore, 475mm stroke, G3/4 port, and output force, fitting your existing fixtures perfectly.
The G3/4 port feeds a 40mm rod. At 0.5 MPa it pushes 15708 N and pulls 15080 N. At 0.7 MPa push is 21991 N, and at 0.9 MPa it is 28274 N. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX475
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX475 replacement — usually within 7-8 hours.