This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX475S, 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 SI63AX475S
The AirTAC Airtac SI63 Standard Cylinder SI63AX475S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 475mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX475S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke475 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX475S
- 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 SI63AX475S
The AirTAC SI63AX475S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 475 mm stroke. It delivers 1559 N push force at 0.5 MPa. The direct replacement is the SAI63AX475S, matching the ISO 15552 mounting interface, stroke, force, G3/8 port and accessories. This specific SKU features a SUS420J2 stainless steel rod (-A) and a piston magnet (-S) for CS1-B/DS1-B sensors.
The SAI upgrade utilizes two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI63 Standard Cylinder SI63AX475S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX475S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX475S |
| Bore size | Ø63 mm |
| Stroke | 475 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 SAI63AX475S 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 SAI63AX475S 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 SI63AX475S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×475 | 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 SI63AX475S Is Used
Material Diversion
Actuates routing gates on package lines, using the 1559 N thrust to push heavy cartons smoothly at 0.5 MPa.
Pallet Handling
Drives lifting mechanisms for palletized goods, where the 475 mm stroke provides the reach needed for tiered racking.
Stainless Rod Press
Performs light-duty pressing in humid environments using the SUS420J2 rod option to resist corrosion.
Replacing the Airtac SI63 Standard Cylinder SI63AX475S with the SAI63AX475S
To replace the SI63AX475S, order the SAI63AX475S keeping the -A stainless rod and -S magnet. Verify the ISO 15552 mounting fixture, 475 mm stroke, and G3/8 port. The SAI accepts current AirTAC switches where the SI used legacy CS1-B/DS1-B sensors. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; neighboring bores are 50 mm (982 N) and 80 mm (2513 N). A 475 mm stroke requires external guides to prevent rod bending under side loads. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX475S
- ✓ 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 SI63AX475S FAQ
Yes, the SI63AX475S is discontinued. The direct replacement is the SAI63AX475S. It is dimensionally interchangeable per ISO 15552, offering the same 63 mm bore, 475 mm stroke, force, G3/8 port, and mounting interface.
The G3/8 port feeds a 63 mm bore yielding 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a max of 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX475S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX475S replacement — usually within 7-8 hours.