This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX180S, 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 SI63AX180S
The AirTAC Airtac SI63 Standard Cylinder SI63AX180S 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 SAI63AX180S, 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 → SAI63AX180S
- 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 SI63AX180S
The AirTAC SI63AX180S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 180mm stroke, and a SUS420J2 stainless piston rod. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63AX180S, a direct sharing the exact ISO 15552 mounting interface, stroke, and output force.
The SAI upgrade features a two-piece Y-shaped piston seal for low start-up pressure and extended life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family also adds SAIL lock and BSAI clamp-lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63AX180S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX180S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX180S |
| 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 SAI63AX180S 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 SAI63AX180S 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 SI63AX180S
| 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 SI63AX180S Is Used
Clamp Actuation
Provides 1559 N of clamping thrust at 0.5 MPa for securing medium-weight machined parts during milling or drilling operations.
Package Diverting
Drives a 180mm stroke diverting arm to route heavy cartons on packaging lines, utilizing the SUS420J2 rod for moisture resistance.
Pallet Stopping
Acts as a pneumatic stop gate for loaded pallets, absorbing kinetic energy via the 30mm adjustable air cushions at both ends.
Replacing the Airtac SI63 Standard Cylinder SI63AX180S with the SAI63AX180S
To replace the SI63AX180S, order the SAI63AX180S keeping the -A stainless rod and -S magnet. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and M16x1.5 thread. The 63mm bore yields 1559 N push at 0.5 MPa; step down to a 50mm bore for 982 N, or up to an 80mm bore for 2513 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for holding, or specify a SAIL/BSAI lock variant. For this 180mm stroke, guide external rods to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX180S
- ✓ 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 SI63AX180S FAQ
Yes, the SI63AX180S is discontinued. The direct replacement is the SAI63AX180S. It shares the identical ISO 15552 mounting interface, 63mm bore, 180mm stroke, G3/8 port, and force ratings, fitting existing fixtures perfectly.
This 63mm bore double-acting cylinder features a G3/8 air port. It generates 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 SAI63AX180S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX180S replacement — usually within 7-8 hours.