This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX125S, 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 SI200BX125S
The AirTAC SI200 Standard Cylinder SI200BX125S 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 SAI200BX125S, 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 → SAI200BX125S
- 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 SI200BX125S
The AirTAC SI200BX125S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 125 mm stroke. It delivers 15708 N push force at 0.5 MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI200BX125S, a direct upgrade retaining the exact ISO 15552 mounting interface, M36x2 thread, and 50 mm cushions.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. This -S variant includes a piston magnet for legacy CS1-B/DS1-B sensors. The -B rod is SUS304 stainless steel.
Airtac SI200 Standard Cylinder SI200BX125S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX125S |
| 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 SAI200BX125S 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 SAI200BX125S 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 SI200BX125S
| 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 SI200BX125S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa with robust 50 mm end cushions.
Automotive Assembly Jig
Actuates massive welding fixtures and body panels, utilising the SUS304 stainless rod for corrosion resistance.
Replacing the Airtac SI200 Standard Cylinder SI200BX125S with the SAI200BX125S
To replace the SI200BX125S, order the SAI200BX125S. Confirm the ISO 15552 mounting interface, 200 mm bore, 125 mm stroke, G3/4 port, and -S magnet. The SAI family adds SAIL and BSAI lock variants for load holding, since a plain cylinder drifts without live air and its cushions only decelerate. For sizing, the neighbouring 160 mm bore yields 10053 N push at 0.5 MPa, while this 200 mm bore hits 21991 N at 0.7 MPa. The -B SUS304 rod resists corrosion versus standard carbon steel. Speed is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX125S
- ✓ 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 SI200BX125S FAQ
Yes, the SI200BX125S is discontinued. The direct replacement is the SAI200BX125S. It shares the same ISO 15552 mounting interface, 200 mm bore, 125 mm stroke, G3/4 port, and output force, fitting existing fixtures perfectly.
The 200 mm bore uses a G3/4 port. It delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, and a theoretical max force of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX125S replacement — usually within 7-8 hours.