This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX475, 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 SI63AX475
The AirTAC Airtac SI63 Standard Cylinder SI63AX475 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 SAI63AX475, 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 → SAI63AX475
- 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 SI63AX475
The AirTAC SI63AX475 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 475mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63AX475, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, force and port size.
The SAI upgrade features a revised piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. This SKU includes a SUS420J2 stainless rod (A) for corrosion resistance but lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63AX475 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX475 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX475 |
| 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 SAI63AX475 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 SAI63AX475 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 SI63AX475
| 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 SI63AX475 Is Used
Material Diversion
Drives diverter gates on packaging lines, utilizing the 1559N push force at 0.5MPa to reliably pivot heavy cardboard cartons at high cycle rates.
Vertical Pressing
Applies downward clamping pressure for assembly tasks. Ensure external guidance is used across this 475mm stroke to prevent rod deflection.
Pallet Handling
Pushes loaded pallets into wrapping stations. The SUS420J2 stainless rod option withstands humid or wash-down logistics environments.
Replacing the Airtac SI63 Standard Cylinder SI63AX475 with the SAI63AX475
To replace the SI63AX475, order the SAI63AX475. Verify your ISO 15552 mounting fixtures (LB, FA, TC, etc.), the G3/8 port threads, and the M16x1.5 rod end. Because this 475mm stroke exceeds 300mm, use external guides to prevent rod bending and premature seal wear from side loads. If you need more force, the 80mm bore yields 2513N push at 0.5MPa; if less is required, the 50mm bore provides 982N. This non-magnetic SKU cannot support position sensing. Note that air cushions only decelerate the piston; they do not hold loads. For drop prevention, use an external pilot check valve or explore the SAIL or BSAI locking variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX475
- ✓ 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 SI63AX475 FAQ
Yes, the SI63AX475 is discontinued. The direct replacement is the SAI63AX475. It shares the identical ISO 15552 mounting interface, 63mm bore, 475mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
This 63mm bore cylinder uses a G3/8 air 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 force of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX475
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX475 replacement — usually within 7-8 hours.