This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X425S, 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 SI200X425S
The AirTAC Airtac SI200 Standard Cylinder SI200X425S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 425mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X425S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke425 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X425S
- 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 SI200X425S
The AirTAC SI200X425S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 425 mm stroke. It delivers 15708 N of push force at 0.5 MPa through a G3/4 port. AirTAC replaced this legacy unit with the SAI200X425S, a direct sharing the exact ISO 15552 mounting interface, M36x2 rod thread, and 50 mm cushions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also introduces SAIL and BSAI lock variants absent in the SI line. Your SI200X425S includes a magnet for CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI200 Standard Cylinder SI200X425S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X425S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X425S |
| Bore size | Ø200 mm |
| Stroke | 425 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 SAI200X425S 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 SAI200X425S 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 SI200X425S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×425 | 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 SI200X425S Is Used
Heavy Press Forming
Drives large stamping and forming presses requiring up to 28274 N of thrust at 0.9 MPa, utilizing the 425 mm stroke to fully cycle heavy tooling.
Large Mold Transfer
Actuates heavy industrial mold transfer carriages over a 425 mm distance, relying on the robust 40 mm piston rod and 50 mm cushions for smooth stops.
Replacing the Airtac SI200 Standard Cylinder SI200X425S with the SAI200X425S
To replace the SI200X425S, order the SAI200X425S, verifying the ISO 15552 mounting interface, G3/4 port, and magnet option. If you need less force, the 160 mm bore offers 10053 N push at 0.5 MPa; if you need more, note the 200 mm bore hits a theoretical max of 3204 kgf at 1.0 MPa. Because this is a 425 mm stroke, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding. The SAIL or BSAI lock variants are alternative solutions.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X425S
- ✓ 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 SI200X425S FAQ
Yes, the AirTAC SI200X425S is discontinued. The direct replacement is the SAI200X425S. It shares the exact ISO 15552 mounting interface, 200 mm bore, 425 mm stroke, output force, G3/4 port, and 50 mm cushion, fitting directly into existing fixtures.
This 200 mm bore cylinder features a G3/4 port and a 40 mm rod. It delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and 28274 N push at 0.9 MPa. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X425S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X425S replacement — usually within 7-8 hours.