This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX30S, 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 SI63BX30S
The AirTAC Airtac SI63 Standard Cylinder SI63BX30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 30mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke30 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX30S
- 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 SI63BX30S
The AirTAC SI63BX30S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore, 30 mm stroke, and a SUS304 stainless steel piston rod. It delivers 1559 N push and 1402 N pull at 0.5 MPa. AirTAC replaced this legacy unit with the SAI63BX30S, a direct upgrade retaining the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the broader SAI family adds SAIL, SAIF, and BSAI lock variants.
Airtac SI63 Standard Cylinder SI63BX30S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX30S |
| Bore size | Ø63 mm |
| Stroke | 30 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 SAI63BX30S 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 SAI63BX30S 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 SI63BX30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×30 | 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 SI63BX30S Is Used
Stainless Rod Clamping
Ideal for short-stroke clamping in washdown environments where the SUS304 rod resists corrosion and the 1559 N force secures heavy parts.
Transfer Line Diverting
Provides robust 30 mm actuation for diverting components on automated conveyors, utilizing the ISO 15552 mounting for rigid fixture integration.
Short-Stroke Ejection
Delivers rapid 79 kg vertical lift capability for ejecting finished goods from machinery, benefiting from the 30-800 mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63BX30S with the SAI63BX30S
To replace the SI63BX30S, order the SAI63BX30S. It drops directly into existing fixtures via the ISO 15552 mounting interface, matching the 63 mm bore, 30 mm stroke, G3/8 port, and M16x1.5 thread. Retain the -B SUS304 stainless rod for corrosion resistance and the -S magnet for current AirTAC switch compatibility. This 63 mm bore outputs 1559 N push at 0.5 MPa; if less force is acceptable, a 50 mm bore provides 982 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX30S
- ✓ 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 SI63BX30S FAQ
Yes, the SI63BX30S is discontinued. The direct replacement is the SAI63BX30S. It shares the same ISO 15552 mounting interface, 63 mm bore, 30 mm stroke, output force, G3/8 port, and SUS304 rod, fitting existing fixtures perfectly.
The 63 mm bore uses a G3/8 air port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX30S replacement — usually within 7-8 hours.