This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX430S, 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 SI63BX430S
The AirTAC Airtac SI63 Standard Cylinder SI63BX430S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 430mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX430S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke430 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX430S
- 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 SI63BX430S
The AirTAC SI63BX430S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 430 mm stroke. It delivers a push force of 1559 N at 0.5 MPa, features a G3/8 air port, and uses a SUS304 stainless steel piston rod (the -B option) for corrosion resistance. The direct replacement is the SAI63BX430S, which shares the exact same ISO 15552 mounting interface, bore, stroke, force, and port.
The SAI upgrade introduces a refined piston seal utilizing two Y-shaped one-way elements for extended life and low start-up pressure. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family also adds SAIL, SAIF, and BSAI lock or self-valve variants the SI lacked.
Airtac SI63 Standard Cylinder SI63BX430S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX430S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX430S |
| Bore size | Ø63 mm |
| Stroke | 430 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 SAI63BX430S 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 SAI63BX430S 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 SI63BX430S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×430 | 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 SI63BX430S Is Used
Diverting Heavy Goods
Pushes heavy pallets or totes on a packaging line using 1559 N of thrust at 0.5 MPa, with the 430 mm stroke clearing wide product profiles.
Vertical Lowering
Lowers lightweight platens or covers; ensure the 79 kg vertical lift capacity is not exceeded and use external guides for the 430 mm extension.
Stainless Rod Washdown
The SUS304 piston rod provides corrosion resistance for general industrial or mildly humid environments where a standard carbon rod might degrade.
Replacing the Airtac SI63 Standard Cylinder SI63BX430S with the SAI63BX430S
To replace the discontinued SI63BX430S, order the SAI63BX430S. Verify that your existing fixture matches the ISO 15552 mounting interface, the 63 mm bore, the 430 mm stroke, and the G3/8 port. Retain your original mounting accessory (such as an LB foot or TC trunnion) and note that the -S magnet allows for sensor use, though the SAI uses current AirTAC switches rather than the legacy CS1-B/DS1-B. If you need to size up or down, neighboring bores are 50 mm and 80 mm, offering 982 N and 2513 N of push force at 0.5 MPa respectively. Because this is a 430 mm stroke, add external guides to prevent rod bending and side-load wear. A plain cylinder does not hold load without live air; the cushion only decelerates. For load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX430S
- ✓ 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 SI63BX430S FAQ
Yes, the SI63BX430S is discontinued. The direct replacement is the SAI63BX430S. It shares the same ISO 15552 mounting interface, 63 mm bore, 430 mm stroke, output force, G3/8 port, and SUS304 stainless rod, fitting directly into existing fixtures.
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. At 0.7 MPa it pushes 2182 N, and at 0.9 MPa it pushes 2805 N. The theoretical maximum is 318 kgf at 1.0 MPa. The operating speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX430S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX430S replacement — usually within 7-8 hours.