This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX475, 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 SI63BX475
The AirTAC Airtac SI63 Standard Cylinder SI63BX475 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 SAI63BX475, 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 → SAI63BX475
- 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 SI63BX475
The AirTAC SI63BX475 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 475mm stroke. Delivering 1559 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI63BX475. This SUS304 stainless-rod variant resists corrosion, but lacks a magnet, so it cannot take a sensor.
The SAI63BX475 is a direct replacement sharing the same ISO 15552 mounting interface, bore, stroke, force and port. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI63 Standard Cylinder SI63BX475 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX475 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX475 |
| 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 SAI63BX475 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 SAI63BX475 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 SI63BX475
| 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 SI63BX475 Is Used
Stainless Rod Diverters
Actuates routing gates on washdown conveyor lines where the SUS304 rod prevents corrosion.
Guided Vertical Lifts
Lowers 79 kg guided platens using the 1559 N push force, requiring external load supports.
Long-Stroke Material Ejectors
Pushes parts out of a machining zone over 475mm, needing external guides to stop rod bending.
Replacing the Airtac SI63 Standard Cylinder SI63BX475 with the SAI63BX475
To replace the SI63BX475, order the SAI63BX475. Confirm the ISO 15552 mounting interface, the G3/8 port, and your specific mounting accessory (LB, FA, CA, TC). Because this SKU has no -S magnet, it cannot accept CS1-B/DS1-B sensors; if sensing is needed, select an SAI model with an S suffix. The -B rod is SUS304 stainless steel. For sizing alternatives, a 50mm bore gives 982 N [email protected], while an 80mm bore gives 2513 N. 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. Finally, at 475mm stroke, prevent rod bending by guiding the load externally to avoid side-load stress.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX475
- ✓ 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 SI63BX475 FAQ
Yes, the SI63BX475 is discontinued. The direct replacement is the SAI63BX475, which shares the same ISO 15552 mounting interface, 63mm bore, 475mm stroke, output force, and G3/8 port. You simply order the SAI equivalent.
It features a G3/8 air port and delivers 1559 N push / 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical max of 318 kgf at 1.0 MPa. The rod is SUS304 stainless steel, and it operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX475
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX475 replacement — usually within 7-8 hours.