This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX145S, 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 SI63BX145S
The AirTAC Airtac SI63 Standard Cylinder SI63BX145S 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 SAI63BX145S, 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 → SAI63BX145S
- 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 SI63BX145S
The AirTAC SI63BX145S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore, 145 mm stroke, and a SUS304 stainless steel rod. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63BX145S, matching the bore, stroke, force, port, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI unit includes a piston magnet for legacy CS1-B/DS1-B sensors. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI63 Standard Cylinder SI63BX145S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX145S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX145S |
| 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 SAI63BX145S 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 SAI63BX145S 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 SI63BX145S
| 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 SI63BX145S Is Used
Stainless Rod Diverters
The SUS304 rod provides corrosion resistance for diverting packages on washdown conveyor lines, delivering 1559 N push force at 0.5 MPa.
Replacing the Airtac SI63 Standard Cylinder SI63BX145S with the SAI63BX145S
To replace the SI63BX145S, order the SAI63BX145S. Confirm the ISO 15552 mounting interface, 145 mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. The -B rod is SUS304 stainless steel, and -S denotes a magnet for CS1-B/DS1-B sensors. For sizing, the 50 mm bore yields 982 N push at 0.5 MPa, while the 80 mm bore yields 2513 N. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX145S
- ✓ 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 SI63BX145S FAQ
Yes, the SI63BX145S is discontinued. The direct replacement is the SAI63BX145S. It features the same ISO 15552 mounting interface, 63 mm bore, 145 mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
This double-acting cylinder has a G3/8 air port. Force ratings are 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 SAI63BX145S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX145S replacement — usually within 7-8 hours.