This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX145, 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 SI63BX145
The AirTAC SI63 Standard Cylinder SI63BX145 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 145mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX145, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke145 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX145
- 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 SI63BX145
The AirTAC SI63BX145 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 145 mm stroke. It features a SUS304 stainless steel piston rod, delivers 1559 N push force at 0.5 MPa, and uses a G3/8 air port. AirTAC replaced this legacy unit with the SAI63BX145, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because this specific SI63BX145 SKU lacks a magnet (-S), it cannot accept position switches.
Airtac SI63 Standard Cylinder SI63BX145 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX145 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX145 |
| Bore size | Ø63 mm |
| Stroke | 145 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 SAI63BX145 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 SAI63BX145 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 SI63BX145
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×145 | 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 SI63BX145 Is Used
Washdown Clamping
Ideal for food or chemical processing fixtures where the SUS304 stainless rod resists moisture while providing 1559 N of clamping thrust.
Package Diverting
Provides reliable 145 mm actuation to push medium-weight cartons off a production line without requiring magnetic sensing.
Pallet Stops
Acts as a robust pneumatic stop gate for pallets, utilizing the 63 mm bore's 1402 N pull force to retract out of the path.
Replacing the Airtac SI63 Standard Cylinder SI63BX145 with the SAI63BX145
To replace the discontinued SI63BX145, order the SAI63BX145. It drops directly into existing fixtures via the identical ISO 15552 mounting interface. Verify your mounting accessory (LB foot, FA flange, TC trunnion, etc.) and confirm the G3/8 port threads. This unit has a SUS304 stainless rod; if corrosion is not a concern, the standard carbon steel rod works too. Since there is no -S magnet, you cannot mount sensors. If sizing up, the 80 mm bore offers 2513 N at 0.5 MPa; if sizing down, the 50 mm bore gives 982 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 variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX145
- ✓ 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 SI63BX145 FAQ
Yes, the AirTAC SI63BX145 is discontinued. The direct replacement is the SAI63BX145. It features the same ISO 15552 mounting interface, 63 mm bore, 145 mm stroke, G3/8 port, and SUS304 stainless rod, but adds an upgraded two Y-shaped element piston seal for longer life.
The bore uses a G3/8 air port. At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa. It operates at 30-800 mm/s with 30 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX145
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX145 replacement — usually within 7-8 hours.