This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX125S, 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 SI200AX125S
The AirTAC SI200 Standard Cylinder SI200AX125S 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 SAI200AX125S, 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 → SAI200AX125S
- 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 SI200AX125S
The AirTAC SI200AX125S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 125mm stroke. Built for heavy-duty tasks, it delivers 15708 N of push force at 0.5 MPa through its G3/4 port. The direct replacement is the SAI200AX125S, which matches the original ISO 15552 mounting interface, M36x2 rod thread, and 50mm cushions.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SI200AX125S features a SUS420J2 stainless steel rod and a piston magnet for CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200AX125S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX125S |
| 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 SAI200AX125S 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 SAI200AX125S 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 SI200AX125S
| 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 SI200AX125S Is Used
Heavy Press Forming
Generates 21991 N at 0.7 MPa to form thick metal plates and structural components in automated fabrication lines.
Industrial Clamp Jigs
Secures large castings during machining, using the 50mm adjustable air cushions to decelerate the massive moving mass smoothly.
Replacing the Airtac SI200 Standard Cylinder SI200AX125S with the SAI200AX125S
To replace the SI200AX125S, order the SAI200AX125S. Confirm the ISO 15552 mounting interface, the 125mm stroke, G3/4 port, and your mounting accessory. The -S magnet enables CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. The -A rod is SUS420J2 stainless steel. Sizing down, a 160mm bore offers 10053 N push at 0.5 MPa; sizing up is not possible as 200mm is the largest. A plain cylinder drifts on air loss, so for load holding use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX125S
- ✓ 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 SI200AX125S FAQ
Yes, the SI200AX125S is discontinued. The direct replacement is the SAI200AX125S. It is dimensionally interchangeable per ISO 15552, matching the 200mm bore, 125mm stroke, output force, G3/4 port, and mounting fixtures.
The SI200AX125S operates at 30-500 mm/s. 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 maximum force of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX125S replacement — usually within 7-8 hours.