This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX55, 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 SI200BX55
The AirTAC Airtac SI200 Standard Cylinder SI200BX55 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 55mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX55, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke55 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX55
- 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 SI200BX55
The AirTAC SI200BX55 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 55mm stroke. Built for heavy-duty tasks, it delivers 15708 N push force at 0.5 MPa. The direct replacement is the SAI200BX55, matching the exact bore, stroke, G3/4 port, and ISO 15552 mounting interface.
This SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For load holding, note that a standard cylinder drifts without live air; use an external rod lock or the SAIL/BSAI lock variants. This SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200BX55 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX55 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX55 |
| Bore size | Ø200 mm |
| Stroke | 55 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 SAI200BX55 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 SAI200BX55 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 SI200BX55
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×55 | 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 SI200BX55 Is Used
Heavy Pressing
Drives large stamping and forming presses requiring 15708 N of push force at 0.5 MPa.
Mold Clamping
Secures heavy industrial molds on injection machinery using its 200mm bore capacity.
Replacing the Airtac SI200 Standard Cylinder SI200BX55 with the SAI200BX55
To replace the SI200BX55, order the SAI200BX55. Verify the ISO 15552 mounting interface, 200mm bore, 55mm stroke, G3/4 port, and M36x2 rod thread. Because this SKU has no magnet (-S), it cannot support position sensing; add the S suffix if you need CS1-B/DS1-B switches. For sizing, the 200mm bore yields 15708 N push at 0.5 MPa; if downsizing, a 160mm bore offers 10053 N. Since this is a high-force cylinder, evaluate side loads. For suspended loads that must not drift on air loss, specify an external pilot check valve or the SAIL/BSAI lock variant, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX55
- ✓ 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 SI200BX55 FAQ
Yes, the AirTAC SI200BX55 is discontinued. The direct replacement is the SAI200BX55. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 55mm stroke, output force, G3/4 port, and mounting interface.
It 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 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 SAI200BX55
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX55 replacement — usually within 7-8 hours.