This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX280S, 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 SI200BX280S
The AirTAC Airtac SI200 Standard Cylinder SI200BX280S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 280mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX280S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke280 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX280S
- 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 SI200BX280S
The AirTAC SI200BX280S is a discontinued double-acting ISO 15552 profile cylinder featuring a 200 mm bore and 280 mm stroke. Built with an extruded aluminum barrel, it delivers 15708 N of push force at 0.5 MPa. The direct replacement is the SAI200BX280S, which matches the exact ISO 15552 mounting interface, G3/4 port, M36x2 rod thread, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This specific unit includes the -S magnet for CS1-B/DS1-B legacy sensors and the -B SUS304 stainless steel rod for corrosion resistance.
Airtac SI200 Standard Cylinder SI200BX280S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX280S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX280S |
| Bore size | Ø200 mm |
| Stroke | 280 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 SAI200BX280S 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 SAI200BX280S 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 SI200BX280S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×280 | 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 SI200BX280S Is Used
Heavy Stamping
Drives large presses and metal forming tools where the 21991 N push force at 0.7 MPa is required to deform heavy plate steel.
Pallet Handling
Indexes loaded pallets on high-capacity conveyors, utilizing the 280 mm stroke to push heavy goods smoothly between machining cells.
Clamp Fixtures
Secures oversized structural components during welding or machining, taking advantage of the 801 kg vertical lift margin for reliable holding.
Replacing the Airtac SI200 Standard Cylinder SI200BX280S with the SAI200BX280S
To replace the SI200BX280S, order the SAI200BX280S and confirm the ISO 15552 mounting interface, 200 mm bore, 280 mm stroke, G3/4 port, and -S magnet. The SAI family also adds SAIL (air-released lock), SAIF (built-in 4M valve), and BSAI (clamp-lock) variants the SI lacked. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock or pilot check valve. If sizing both ways, neighboring bores shift force significantly, but this 200 mm bore hits a theoretical max of 3204 kgf at 1.0 MPa. Because the stroke exceeds 300 mm, ensure adequate guide support to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX280S
- ✓ 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 SI200BX280S FAQ
Yes, the SI200BX280S is discontinued. The direct replacement is the SAI200BX280S. It shares the same ISO 15552 mounting interface, 200 mm bore, 280 mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly.
The G3/4 port feeds a 40 mm rod. At 0.5 MPa it pushes 15708 N and pulls 15080 N. At 0.7 MPa it pushes 21991 N, and the theoretical maximum is 3204 kgf at 1.0 MPa. Speed range is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX280S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX280S replacement — usually within 7-8 hours.