This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX25S, 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 SI200AX25S
The AirTAC SI200 Standard Cylinder SI200AX25S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 25mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX25S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke25 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX25S
- 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 SI200AX25S
The AirTAC SI200AX25S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 25mm stroke. It delivers 15708 N of push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI200AX25S, retaining the exact same interface, force, and mounting. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This specific unit features a SUS420J2 stainless steel rod (-A) and a piston magnet (-S) for legacy CS1-B/DS1-B sensors.
The SAI family also introduces lock and clamp variants (SAIL, BSAI) absent in the legacy SI line. Note that a standard cylinder drifts without live air; the cushion only decelerates at stroke end.
Airtac SI200 Standard Cylinder SI200AX25S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX25S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX25S |
| Bore size | Ø200 mm |
| Stroke | 25 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 SAI200AX25S 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 SAI200AX25S 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 SI200AX25S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×25 | 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 SI200AX25S Is Used
Heavy Press Tonnage
Generates 21991 N at 0.7 MPa for high-force stamping, forming, and riveting operations in metal fabrication.
Pallet Clamp Actuator
Short 25mm stroke provides robust gripping force for securing heavy loads in automated packaging lines.
Mold Locking Mechanism
Delivers reliable high-tonnage holding power for injection mold closures and heavy industrial fixture indexing.
Replacing the Airtac SI200 Standard Cylinder SI200AX25S with the SAI200AX25S
To replace the SI200AX25S, order the SAI200AX25S. Confirm the ISO 15552 mounting interface, the 200mm bore, 25mm stroke, G3/4 port, and the SUS420J2 stainless rod option. The magnet (-S) allows position sensing; use legacy CS1-B/DS1-B switches or current AirTAC sensors on the SAI. If you need to downsize, a 160mm bore yields 10053 N push at 0.5 MPa; if oversizing, there is no larger standard bore. For load holding on air loss, do not rely on the cushion—it only decelerates. Specify a SAIL air-released lock, a BSAI clamp-lock, or an external pilot check valve. The standard speed range is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX25S
- ✓ 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 SI200AX25S FAQ
Yes, the SI200AX25S is discontinued. The direct replacement is the SAI200AX25S. It is dimensionally interchangeable per ISO 15552, matching the 200mm bore, 25mm stroke, force, G3/4 port, and mounting fixtures.
It features a G3/4 port and provides 15708 N push / 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 SAI200AX25S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX25S replacement — usually within 7-8 hours.