This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX900, 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 SI63 Standard Cylinder SI63AX900
The AirTAC Airtac SI63 Standard Cylinder SI63AX900 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX900, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX900
- 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 SI63 Standard Cylinder SI63AX900
The AirTAC SI63AX900 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 900 mm stroke, and an SUS420J2 stainless piston rod. Delivering 1559 N push force at 0.5 MPa, it is replaced by the SAI63AX900. This direct successor shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot take a sensor, unlike CS1-B/DS1-B equipped versions.
Airtac SI63 Standard Cylinder SI63AX900 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX900 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX900 |
| Bore size | Ø63 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63AX900 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAI63AX900 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63AX900
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×900 | 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 SI63 Standard Cylinder SI63AX900 Is Used
Long-Stroke Diversion
Pushes heavy packages across a 900 mm transfer lane using the 1559 N thrust at 0.5 MPa, guided by external rails to prevent rod bending.
Stainless Rod Actuation
Actuates tooling stages in humid washdown areas using the SUS420J2 rod option, relying on the 30 mm adjustable cushions for smooth stops.
Replacing the Airtac SI63 Standard Cylinder SI63AX900 with the SAI63AX900
To replace the SI63AX900, order the SAI63AX900. Confirm the ISO 15552 interface, 900 mm stroke, G3/8 port, and SUS420J2 rod. This non-magnet SKU cannot accept CS1-B/DS1-B sensors. At 900 mm, prevent rod bending by using external guides to manage side loads. For sizing, neighboring bores offer 982 N (50mm) or 2513 N (80mm) push at 0.5 MPa. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX900
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63AX900 FAQ
Yes, the SI63AX900 is discontinued. The direct replacement is the SAI63AX900. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 900 mm stroke, force, G3/8 port, and mounting interface.
It features a G3/8 air port. Theoretical forces are: 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a maximum force of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX900
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX900 replacement — usually within 7-8 hours.