This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X80FA, 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 SI63X80FA
The AirTAC Airtac SI63 Standard Cylinder SI63X80FA 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 SAI63X80FA, 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 → SAI63X80FA
- 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 SI63X80FA
The AirTAC SI63X80FA is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke and FA flange mounting. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X80FA, a direct upgrade retaining the exact bore, stroke, force, port and ISO 15552 mounting interface.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also introduces SAIL, SAIF and BSAI variants absent from the SI line. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X80FA Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X80FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X80FA |
| 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 SAI63X80FA 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 SAI63X80FA 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 SI63X80FA
| 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 SI63X80FA Is Used
Clamp Actuation
Provides reliable 1559 N clamping force at 0.5 MPa for securing mid-weight machined parts during milling or drilling operations.
Package Diverting
Drives a 80 mm stroke diverter arm to route medium-sized cartons on packaging lines, benefiting from the 30-800 mm/s speed range.
Gate Control
Operates heavy-duty flow gates in bulk material handling systems, utilising the FA flange mount for rigid structural attachment.
Replacing the Airtac SI63 Standard Cylinder SI63X80FA with the SAI63X80FA
To replace the SI63X80FA, order the SAI63X80FA. Verify the ISO 15552 FA flange interface, 63 mm bore, 80 mm stroke, G3/8 port (PT/G/NPT thread) and the lack of a magnet. If you need position sensing, switch to an -S SAI equivalent to enable switches. For higher force, the neighbouring 80 mm bore yields 2513 N push at 0.5 MPa; for less, the 50 mm bore gives 982 N. Because this plain cylinder drifts on air loss and the cushion only decelerates, use an external rod lock, pilot check valve or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X80FA
- ✓ 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 SI63X80FA FAQ
Yes, the AirTAC SI63X80FA is discontinued. The direct replacement is the SAI63X80FA. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 80 mm stroke, G3/8 port, FA flange and output force.
The G3/8 port feeds a 20 mm rod. Force output is 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 max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X80FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X80FA replacement — usually within 7-8 hours.