This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X125H, 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 SI200X125H
The AirTAC SI200 Standard Cylinder SI200X125H 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 SAI200X125H, 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 → SAI200X125H
- 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 SI200X125H
The AirTAC SI200X125H is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 125mm stroke. Built for heavy-duty cycles, it delivers 15708 N push and 15080 N pull at 0.5 MPa, operating at 30-500 mm/s through a G3/4 port. The direct replacement is the SAI200X125H, matching the interface, force, and mounting while upgrading the piston seal to two Y-shaped one-way elements for lower start-up pressure.
This SKU features a Viton H seal for 0-150 C environments. Lacking the -S magnet, it cannot accept CS1-B/DS1-B sensors. Note that plain SI/SAI cylinders drift without live air; for load holding, explore the SAIL or BSAI lock variants.
Airtac SI200 Standard Cylinder SI200X125H Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X125H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X125H |
| 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 SAI200X125H 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 SAI200X125H 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 SI200X125H
| 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 SI200X125H Is Used
Heavy Stamp Pressing
Generates 21991 N at 0.7 MPa to drive large metal forming and stamping dies in automotive lines.
High-Temp Ejection
The Viton H seal handles 0-150 C environments, reliably ejecting cast or heated parts from molds.
Replacing the Airtac SI200 Standard Cylinder SI200X125H with the SAI200X125H
To replace the SI200X125H, order the SAI200X125H and verify the ISO 15552 mounting interface, M36x2 rod thread, G3/4 port, and 125mm stroke. Because this high-force cylinder lacks a magnet (-S), position sensing is impossible without external hardware. If your fixture requires holding a load during air loss, the standard cushion only decelerates; you must add an external pilot check valve or switch to the SAIL/BSAI locking variants. When sizing, neighbours like the 160mm bore yield 10053 N push at 0.5 MPa, while the 200mm bore offers 21991 N at 0.7 MPa. For any stroke over 300mm, use guide rails to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X125H
- ✓ 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 SI200X125H FAQ
Yes, the AirTAC SI200X125H is discontinued. The direct replacement is the SAI200X125H. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 125mm stroke, G3/4 port, and mounting fixtures.
This double-acting cylinder uses a G3/4 air port. It outputs 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N at 0.9 MPa, and a maximum theoretical force of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X125H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X125H replacement — usually within 7-8 hours.