This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX180, 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 SI63BX180
The AirTAC Airtac SI63 Standard Cylinder SI63BX180 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 SAI63BX180, 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 → SAI63BX180
- 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 SI63BX180
The AirTAC SI63BX180 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 180mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa, uses a G3/8 port, and features a SUS304 stainless steel rod (-B) for corrosion resistance. Because this SKU lacks a magnet, it cannot accept a position sensor. AirTAC replaced it with the SAI63BX180.
The SAI63BX180 is a direct replacement matching the exact ISO 15552 mounting interface, bore, stroke, force, and port. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63BX180 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX180 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX180 |
| 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 SAI63BX180 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 SAI63BX180 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 SI63BX180
| 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 SI63BX180 Is Used
Stainless Rod Clamping
Ideal for clamping machined parts in humid wash-down cells where the SUS304 rod resists corrosion and the 1559N force secures heavy fixtures.
Carton Diverting
Provides robust 180mm stroke actuation to push heavy pallets or cardboard cartons off a main conveyor line using a 63mm bore profile body.
Material Lift Stops
Acts as a physical stop gate for 79kg vertical lift loads on low-bay storage elevators, decelerating smoothly via its 30mm adjustable cushions.
Replacing the Airtac SI63 Standard Cylinder SI63BX180 with the SAI63BX180
To replace the SI63BX180, order the SAI63BX180. Confirm the ISO 15552 mounting interface, 63mm bore, 180mm stroke, G3/8 port (PT/G/NPT thread), and your mounting accessory. This -B variant uses a SUS304 stainless rod; choose the default carbon steel if corrosion is not a concern. Since this SKU has no -S magnet, it cannot take a CS1-B/DS1-B sensor; order an -S SAI if sensing is needed. A plain cylinder drifts without air and its cushion only decelerates; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant. Neighbouring bores: 50mm gives 982N [email protected], 80mm gives 2513N. At 180mm stroke, ensure guide alignment to prevent rod bending side-loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX180
- ✓ 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 SI63BX180 FAQ
Yes, the SI63BX180 is discontinued. The direct replacement is the SAI63BX180. It shares the same ISO 15552 mounting interface, 63mm bore, 180mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The 63mm bore uses a G3/8 port. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a maximum theoretical force of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX180
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX180 replacement — usually within 7-8 hours.