This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX180, 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 SI63AX180
The AirTAC SI63 Standard Cylinder SI63AX180 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 SAI63AX180, 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 → SAI63AX180
- 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 SI63AX180
The AirTAC SI63AX180 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 180 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. This SUS420J2 stainless rod variant is superseded by the SAI63AX180 direct replacement, which shares identical ISO 15552 mounting dimensions, bore, stroke and output force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnet SKU cannot take a sensor, unlike legacy CS1-B/DS1-B switches. For high heat, Viton H seals raise the temperature limit to 150 C.
Airtac SI63 Standard Cylinder SI63AX180 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX180 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX180 |
| 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 SAI63AX180 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 SAI63AX180 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 SI63AX180
| 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 SI63AX180 Is Used
Stainless Rod Actuation
Ideal for packaging machinery where the SUS420J2 rod resists washdown moisture while providing 1559 N of push force at 0.5 MPa.
Mid-Stroke Diverting
The 180 mm stroke handles diverting or sorting tasks on material handling lines, moving products smoothly without needing the full 1500 mm capacity.
Replacing the Airtac SI63 Standard Cylinder SI63AX180 with the SAI63AX180
To replace the SI63AX180, order the SAI63AX180. Confirm the ISO 15552 mounting interface, 63 mm bore, 180 mm stroke, G3/8 port (PT/G/NPT thread) and your specific mounting accessory. This SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. The SUS420J2 (-A) stainless rod resists corrosion versus the default carbon steel. For sizing, a neighbouring 80 mm bore offers more force, while a 50 mm bore provides 982 N push at 0.5 MPa. The 180 mm stroke is under the 300 mm side-load risk threshold, but always guide external loads to prevent rod bending. A plain cylinder drifts on air loss; for load holding, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX180
- ✓ 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 SI63AX180 FAQ
Yes, the SI63AX180 is discontinued. The direct replacement is the SAI63AX180. It shares the same ISO 15552 mounting interface, 63 mm bore, 180 mm stroke, output force and G3/8 port, fitting existing fixtures perfectly.
The 63 mm bore uses a G3/8 port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa. The piston speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX180
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX180 replacement — usually within 7-8 hours.