This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX155S, 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 SI200BX155S
The AirTAC Airtac SI200 Standard Cylinder SI200BX155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 155mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke155 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX155S
- 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 SI200BX155S
The AirTAC SI200BX155S is a discontinued double-acting ISO 15552 profile cylinder featuring a 200mm bore and 155mm stroke. Delivering 15708 N push force at 0.5 MPa, it is replaced by the SAI200BX155S. This direct upgrade shares the exact ISO 15552 mounting interface, G3/4 port, and M36x2 rod thread, fitting existing fixtures perfectly. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This unit includes the -S magnet for CS1-B/DS1-B sensors and the -B SUS304 stainless rod for corrosion resistance.
The SAI family also introduces lock and clamp variants (SAIL, BSAI) absent in the legacy line. Note that a standard cylinder does not hold load without live air; the cushion only decelerates.
Airtac SI200 Standard Cylinder SI200BX155S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX155S |
| Bore size | Ø200 mm |
| Stroke | 155 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 SAI200BX155S 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 SAI200BX155S 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 SI200BX155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×155 | 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 SI200BX155S Is Used
Heavy Press Systems
Drives large stamping and forming presses requiring up to 28274 N of thrust at 0.9 MPa with stable ISO 15552 mounting.
Large Mold Handling
Shifts heavy injection molds on production lines, utilizing the corrosion-resistant SUS304 rod in humid environments.
Replacing the Airtac SI200 Standard Cylinder SI200BX155S with the SAI200BX155S
To replace the discontinued SI200BX155S, order the SAI200BX155S. Confirm the ISO 15552 mounting interface, 155mm stroke, G3/4 port, and your specific mounting accessory. The -S magnet enables current AirTAC switches (replacing legacy CS1-B/DS1-B), while the -B rod specifies SUS304 stainless steel. Operating speed is 30-500 mm/s. If sizing up or down, evaluate the 28274 N push force at 0.9 MPa or step to a 160mm bore. Because a plain cylinder drifts without live air, use an external rod lock or pilot check valve for load holding; alternatively, specify an SAIL or BSAI lock variant. For this 155mm stroke, ensure adequate guide support to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX155S
- ✓ 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 SI200BX155S FAQ
Yes, the SI200BX155S is discontinued. The direct replacement is the SAI200BX155S. It shares the same ISO 15552 mounting interface, 200mm bore, 155mm stroke, output force, and G3/4 port, fitting existing fixtures directly.
This double-acting cylinder has a G3/4 port and M36x2 rod thread. It delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and 28274 N push at 0.9 MPa. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX155S replacement — usually within 7-8 hours.