This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX80, 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 SI63AX80
The AirTAC Airtac SI63 Standard Cylinder SI63AX80 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 80mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX80, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX80
- 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 SI63AX80
The AirTAC SI63AX80 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke and a 63 mm bore, delivering 1559 N push and 1402 N pull at 0.5 MPa. It features a Ø20 mm rod, M16x1.5 thread, and a G3/8 air port. AirTAC replaced this EOL unit with the SAI63AX80, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI successor introduces an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The -A suffix denotes a SUS420J2 stainless steel piston rod for corrosion resistance. As this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63AX80 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX80 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX80 |
| Bore size | Ø63 mm |
| Stroke | 80 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 SAI63AX80 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 SAI63AX80 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 SI63AX80
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×80 | 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 SI63AX80 Is Used
Clamp Actuation
Provides 1559 N of clamping force at 0.5 MPa for securing mid-weight steel housings during CNC machining.
Package Diverting
Drives a 80 mm stroke diverter arm to route 79 kg palletized goods between parallel conveyor lines.
Lift Gate Control
Raises and lowers a loading bay gate, utilizing the SUS420J2 stainless rod to resist humid environmental corrosion.
Replacing the Airtac SI63 Standard Cylinder SI63AX80 with the SAI63AX80
To replace the SI63AX80, order the SAI63AX80, confirming the ISO 15552 mounting interface, 63 mm bore, 80 mm stroke, G3/8 port (PT/G/NPT), and your specific mounting accessory (LB, FA, TC, etc.). Because this is a no-S SKU, it has no magnet and cannot take a sensor; if position detection is needed, switch to an SAI63AX80S. Sizing both ways: the 63 mm bore yields 1559 N push at 0.5 MPa, while the neighbouring 80 mm bore offers 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variant. The -A rod is SUS420J2 stainless; a Viton H seal raises operating temperature to 0-150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX80
- ✓ 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 SI63AX80 FAQ
Yes, the AirTAC SI63AX80 is discontinued. The direct replacement is the SAI63AX80. It is dimensionally interchangeable per ISO 15552, keeping the same 63 mm bore, 80 mm stroke, G3/8 port, and mounting interface, but adds an upgraded Y-shaped piston seal.
The 63 mm bore uses a G3/8 air port. At 0.5 MPa it provides 1559 N push and 1402 N pull. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Request a Quote for the SAI63AX80
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX80 replacement — usually within 7-8 hours.