This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X80STC, 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 SI63X80STC
The AirTAC Airtac SI63 Standard Cylinder SI63X80STC 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 SAI63X80STC, 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 → SAI63X80STC
- 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 SI63X80STC
The AirTAC SI63X80STC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke, delivering 1559 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI63X80STC, a direct upgrade retaining the exact TC trunnion mounting, bore, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI63 Standard Cylinder SI63X80STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X80STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X80STC |
| 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 SAI63X80STC 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 SAI63X80STC 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 SI63X80STC
| 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 SI63X80STC Is Used
Clamp Actuation
Secures heavy machining fixtures with 1559 N of push force, ensuring rigid part holding during milling or drilling operations.
Package Diversion
Drives a 80 mm stroke routing gate to redirect mid-weight pallets or cartons across automated material handling lines.
Replacing the Airtac SI63 Standard Cylinder SI63X80STC with the SAI63X80STC
To replace the SI63X80STC, order the SAI63X80STC. Confirm the ISO 15552 interface, 63 mm bore, 80 mm stroke, G3/8 port, and TC trunnion mount. The -S magnet works with legacy CS1-B/DS1-B sensors, though the SAI uses current AirTAC switches. If you need more force, the 80 mm bore yields 2513 N push at 0.5 MPa; if less is needed, the 50 mm bore gives 982 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X80STC
- ✓ 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 SI63X80STC FAQ
Yes, the AirTAC SI63X80STC is discontinued. The direct replacement is the SAI63X80STC, which shares the same ISO 15552 mounting interface, 63 mm bore, 80 mm stroke, G3/8 port, and output force.
It features a G3/8 air port and provides 1559 N push / 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a maximum theoretical force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X80STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X80STC replacement — usually within 7-8 hours.