This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX150S, 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 SI63BX150S
The AirTAC SI63 Standard Cylinder SI63BX150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX150S
- 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 SI63BX150S
The AirTAC SI63BX150S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 150mm stroke, and a SUS304 stainless steel piston rod. Delivering 1559N push force at 0.5MPa through a G3/8 port, it is directly replaced by the SAI63BX150S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, and force, fitting existing fixtures perfectly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet enables legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63BX150S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX150S |
| Bore size | Ø63 mm |
| Stroke | 150 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 SAI63BX150S 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 SAI63BX150S 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 SI63BX150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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 SI63BX150S Is Used
Stainless Rod Diverters
The SUS304 piston rod resists washdown moisture, making this 1559N cylinder ideal for diverting packages on food-grade conveyor lines.
Vertical Lift Gates
Providing a safe vertical lift capacity of approximately 79kg, it reliably raises and lowers material handling gates in logistics hubs.
Mid-Force Clamp Actuators
Delivers robust 1559N clamping force at 0.5MPa for securing medium-sized aluminum castings during CNC machining operations.
Replacing the Airtac SI63 Standard Cylinder SI63BX150S with the SAI63BX150S
To replace the SI63BX150S, order the SAI63BX150S, confirming the ISO 15552 interface, 63mm bore, 150mm stroke, G3/8 port, and mounting accessory. The -B suffix denotes the SUS304 stainless rod, and the -S suffix provides the magnet for current AirTAC switches (replacing legacy CS1-B/DS1-B units). Sizing both ways: a neighbouring 80mm bore offers 2513N push at 0.5MPa, while dropping to 50mm yields 982N. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding, specify an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX150S
- ✓ 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 SI63BX150S FAQ
Yes, the SI63BX150S is discontinued. The direct replacement is the SAI63BX150S. It shares the same ISO 15552 mounting interface, 63mm bore, 150mm stroke, output force, and G3/8 port, fitting existing fixtures without modification.
It features a G3/8 air port and M16x1.5 rod thread. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX150S replacement — usually within 7-8 hours.