This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX800, 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 SI63AX800
The AirTAC Airtac SI63 Standard Cylinder SI63AX800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 800mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX800
- 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 SI63AX800
The AirTAC SI63AX800 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 800mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63AX800, a direct sharing the exact ISO 15552 mounting interface, stroke, and force.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because this specific SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor. The -A code denotes a SUS420J2 stainless steel rod for corrosion resistance.
Airtac SI63 Standard Cylinder SI63AX800 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX800 |
| Bore size | Ø63 mm |
| Stroke | 800 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 SAI63AX800 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 SAI63AX800 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 SI63AX800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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 SI63AX800 Is Used
Long-Stroke Diversion
Pushes heavy pallets across transfer lines using the full 800mm extension, relying on the 1559N thrust at 0.5MPa to overcome guide friction.
Corrosive Environment Actuation
Drives tooling stages in humid washdown areas using the SUS420J2 stainless rod option to resist rust over the long 800mm travel.
Replacing the Airtac SI63 Standard Cylinder SI63AX800 with the SAI63AX800
To replace the SI63AX800, order the SAI63AX800. Confirm the ISO 15552 mounting fixture, 63mm bore, 800mm stroke, G3/8 port, and SUS420J2 rod. Because this SKU has no -S magnet, it cannot support position sensing. For sizing alternatives, a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. At 800mm, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX800
- ✓ 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 SI63AX800 FAQ
Yes, the SI63AX800 is discontinued. The direct replacement is the SAI63AX800. It shares the identical ISO 15552 mounting interface, 63mm bore, 800mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
This double-acting cylinder uses a G3/8 port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX800
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX800 replacement — usually within 7-8 hours.