This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX425S, 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 SI200AX425S
The AirTAC Airtac SI200 Standard Cylinder SI200AX425S 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 SAI200AX425S, 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 → SAI200AX425S
- 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 SI200AX425S
The AirTAC SI200AX425S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 425mm stroke. It delivers 15708N push at 0.5MPa via a G3/4 port. The direct replacement is the SAI200AX425S, matching the bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
This SAI upgrade features a new piston seal (two Y-shaped one-way elements for low start-up pressure) and adds SAIL/BSAI lock variants the SI lacked. The -A rod is SUS420J2 stainless, -S adds a magnet for CS1-B/DS1-B switches.
Airtac SI200 Standard Cylinder SI200AX425S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX425S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX425S |
| 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 SAI200AX425S 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 SAI200AX425S 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 SI200AX425S
| 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 SI200AX425S Is Used
Heavy Press Clamping
Generates up to 28274N of clamping force at 0.9MPa for securing large steel fabrications during heavy-duty machining and welding operations.
Stamping Press Feed
Drives robust 425mm stroke indexing mechanisms to feed thick metal sheet stock into large industrial stamping presses.
Replacing the Airtac SI200 Standard Cylinder SI200AX425S with the SAI200AX425S
To replace the SI200AX425S, order the SAI200AX425S. Confirm the ISO 15552 mounting interface, 200mm bore, 425mm stroke, G3/4 port, and -S magnet for current AirTAC switches. The -A code specifies the SUS420J2 stainless rod over standard carbon steel. Sizing both ways: neighbouring 160mm yields 10053N push, while 200mm hits 21991N at 0.7MPa. For 425mm strokes, use external guides to prevent rod bending. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX425S
- ✓ 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 SI200AX425S FAQ
Yes, the SI200AX425S is discontinued. The direct replacement is the SAI200AX425S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 425mm stroke, force, G3/4 port and mounting interface.
The G3/4 port feeds a 200mm bore yielding 15708N push and 15080N pull at 0.5MPa, 21991N push at 0.7MPa, and a theoretical max of 3204kgf at 1.0MPa. The cushion is 50mm, and speed is 30-500mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX425S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX425S replacement — usually within 7-8 hours.