This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX180S, 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 SI63BX180S
The AirTAC Airtac SI63 Standard Cylinder SI63BX180S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 180mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX180S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke180 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX180S
- 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 SI63BX180S
The AirTAC SI63BX180S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore, 180 mm stroke, and a SUS304 stainless steel piston rod. It delivers 1559 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI63BX180S, a direct upgrade retaining the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. With the -S magnet, this cylinder supports legacy CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63BX180S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX180S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX180S |
| Bore size | Ø63 mm |
| Stroke | 180 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 SAI63BX180S 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 SAI63BX180S 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 SI63BX180S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×180 | 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 SI63BX180S Is Used
Stainless Rod Diverting
Ideal for diverting packages on a conveyor belt where the SUS304 rod resists moisture and the 180 mm stroke provides precise lateral movement.
Vertical Lift Gate
Lifts light access gates in warehouse environments, safely handling loads near the 79 kg vertical lift capacity calculated at 0.5 MPa.
Clamp Actuation
Actuates clamping fixtures on machining lines, using the 1559 N push force to secure components during milling or drilling operations.
Replacing the Airtac SI63 Standard Cylinder SI63BX180S with the SAI63BX180S
To replace the SI63BX180S, order the SAI63BX180S and confirm the ISO 15552 mounting interface, 63 mm bore, 180 mm stroke, G3/8 port, and your specific mounting accessory. The -B rod is SUS304 stainless steel, and the -S magnet works with legacy CS1-B/DS1-B switches. If sizing up or down, neighboring bores are 50 mm (982 N push @0.5 MPa) and 80 mm (2513 N push @0.5 MPa). A plain cylinder drifts on air loss; the air cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX180S
- ✓ 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 SI63BX180S FAQ
Yes, the SI63BX180S is discontinued. The direct replacement is the SAI63BX180S. It shares the same ISO 15552 mounting interface, 63 mm bore, 180 mm stroke, output force, G3/8 port, and SUS304 rod, fitting existing fixtures perfectly.
This 63 mm bore cylinder has a G3/8 air port. The 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 SAI63BX180S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX180S replacement — usually within 7-8 hours.