This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX125, 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 SI200BX125
The AirTAC SI200 Standard Cylinder SI200BX125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX125
- 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 SI200BX125
The AirTAC SI200BX125 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 125mm stroke. Delivering 15708N push force at 0.5MPa via a G3/4 port, it is replaced by the SAI200BX125 direct upgrade. This successor matches the exact ISO 15552 mounting-interface dimensions, bore, stroke, force, port and accessories, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life, while the SAI family adds SAIL, SAIF and BSAI lock variants the SI lacked. This SI200BX125 variant uses a SUS304 stainless steel rod (B option) for corrosion resistance. As a no-S SKU, it cannot take a magnetic sensor.
Airtac SI200 Standard Cylinder SI200BX125 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX125 |
| Bore size | Ø200 mm |
| Stroke | 125 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 SAI200BX125 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 SAI200BX125 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 SI200BX125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×125 | 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 SI200BX125 Is Used
Heavy Press Systems
Drives large forming presses requiring massive 15708N push force at 0.5MPa with a 125mm stroke.
Industrial Mold Clamping
Secures heavy injection molds using the SUS304 stainless rod option for corrosion resistance.
Replacing the Airtac SI200 Standard Cylinder SI200BX125 with the SAI200BX125
To replace the SI200BX125, order the SAI200BX125. Confirm the ISO 15552 mounting interface, 200mm bore, 125mm stroke, G3/4 port (PT/G/NPT thread) and mounting accessory. The SAI is a direct. Sizing both ways: a 160mm bore yields 10053N push @0.5MPa, while a 200mm bore yields 21991N @0.7MPa. This no-S SKU lacks a magnet and cannot accept a CS1-B/DS1-B sensor. A plain cylinder drifts on air loss as the 50mm cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For any stroke >=300mm, ensure external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX125
- ✓ 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 SI200BX125 FAQ
Yes, the SI200BX125 is discontinued. The direct replacement is the SAI200BX125. It shares the same ISO 15552 mounting interface, 200mm bore, 125mm stroke, output force, G3/4 port and mounting accessories, fitting existing fixtures perfectly.
The SI200BX125 has a G3/4 port. It delivers 15708N push and 15080N pull at 0.5MPa, 21991N push at 0.7MPa, 28274N push at 0.9MPa, and a theoretical max of 3204 kgf at 1.0MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX125 replacement — usually within 7-8 hours.