This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X690S, 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 SI63X690S
The AirTAC Airtac SI63 Standard Cylinder SI63X690S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 690mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X690S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke690 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X690S
- 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 SI63X690S
The AirTAC SI63X690S is a discontinued double-acting ISO 15552 profile cylinder with a 690 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X690S, a direct upgrade retaining the exact interface, bore, stroke, and thrust.
The SAI successor features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. It also introduces variants the SI lacked, like the SAIL lock and BSAI clamp-lock.
Airtac SI63 Standard Cylinder SI63X690S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X690S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X690S |
| Bore size | Ø63 mm |
| Stroke | 690 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 SAI63X690S 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 SAI63X690S 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 SI63X690S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×690 | 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 SI63X690S Is Used
Long-Stroke Diversion
Pushes heavy pallets across transfer lines using the 690 mm stroke and 1559 N thrust at 0.5 MPa.
Multi-Station Indexing
Shifts tooling carriages between machining cells, requiring external guides to manage the 690 mm extension.
Replacing the Airtac SI63 Standard Cylinder SI63X690S with the SAI63X690S
To replace the SI63X690S, order the SAI63X690S. Confirm the ISO 15552 mounting interface, 63 mm bore, 690 mm stroke, G3/8 port, and the -S magnet for CS1-B/DS1-B sensors. 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. Because the stroke is 690 mm, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X690S
- ✓ 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 SI63X690S FAQ
Yes, the SI63X690S is discontinued. The direct replacement is the SAI63X690S. It shares the same ISO 15552 mounting interface, 63 mm bore, 690 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
It features a G3/8 air port and M16x1.5 rod thread. 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 maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X690S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X690S replacement — usually within 7-8 hours.