This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX500S, 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 SI63AX500S
The AirTAC Airtac SI63 Standard Cylinder SI63AX500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 500mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX500S
- 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 SI63AX500S
The AirTAC SI63AX500S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 500mm stroke, and a SUS420J2 stainless steel rod. It delivers 1559N push force at 0.5MPa, making it a robust choice for industrial actuation. The direct replacement is the SAI63AX500S, which preserves the original G3/8 port, M16x1.5 thread, and ISO 15552 mounting interface for seamless fixture integration.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This -S model includes a piston magnet for CS1-B/DS1-B switches, and you can specify Viton H seals for high-temperature duties up to 150C.
Airtac SI63 Standard Cylinder SI63AX500S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX500S |
| Bore size | Ø63 mm |
| Stroke | 500 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 SAI63AX500S 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 SAI63AX500S 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 SI63AX500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×500 | 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 SI63AX500S Is Used
Diverting Heavy Cartons
Provides the 1559N push force needed to deflect heavy packaging along high-speed material handling lines with a 500mm reach.
Stainless Rod Actuation
The SUS420J2 rod option suits washdown or mildly corrosive CNC tooling environments where carbon steel would pit.
Replacing the Airtac SI63 Standard Cylinder SI63AX500S with the SAI63AX500S
To replace the discontinued SI63AX500S, order the SAI63AX500S, confirming the ISO 15552 interface, 63mm bore, 500mm stroke, G3/8 port, and SUS420J2 stainless rod. The -S magnet enables CS1-B/DS1-B sensors, though the SAI family uses current AirTAC switches. If you need load holding on air loss, note that the standard cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants. For the 500mm stroke, use external guides to prevent rod bending and side-load wear. If downsizing, a 50mm bore yields 982N push at 0.5MPa; if upsizing, an 80mm bore provides 2513N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX500S
- ✓ 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 SI63AX500S FAQ
Yes, the SI63AX500S is discontinued. The direct replacement is the SAI63AX500S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 500mm stroke, G3/8 port, and mounting fixtures, but features an upgraded two Y-shaped one-way piston seal for longer life.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. Force output is 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. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX500S replacement — usually within 7-8 hours.