This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X680, 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 SI63X680
The AirTAC Airtac SI63 Standard Cylinder SI63X680 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 680mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X680, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke680 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X680
- 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 SI63X680
The AirTAC SI63X680 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 680mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X680, matching the exact interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X680 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X680 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X680 |
| Bore size | Ø63 mm |
| Stroke | 680 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 SAI63X680 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 SAI63X680 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 SI63X680
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×680 | 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 SI63X680 Is Used
Long-Stroke Diversion
Pushes heavy pallets laterally across a 680mm conveyor lane using 1559N of thrust at 0.5 MPa.
Elevating Platforms
Lowers light tooling racks; ensure external guides support the 680mm stroke to avoid rod bending.
Warehouse Pusher
Acts as a carton diverter, moving goods smoothly at 30-800 mm/s with adjustable end cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X680 with the SAI63X680
To replace the SI63X680, order the SAI63X680. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC), the G3/8 port thread (PT/G/NPT), and the 680mm stroke. Because this SKU has no -S magnet, it cannot support position sensing. At 680mm, the stroke is long, so use external guides to prevent rod bending and side-load wear. For sizing, the 80mm bore yields 2513N at 0.5MPa, while the 50mm bore yields 982N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X680
- ✓ 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 SI63X680 FAQ
Yes, the SI63X680 is discontinued. The direct replacement is the SAI63X680. It is dimensionally interchangeable per ISO 15552, keeping the same 63mm bore, 680mm stroke, G3/8 port, and mounting fixtures.
The 63mm bore uses a G3/8 port. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa.
Request a Quote for the SAI63X680
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X680 replacement — usually within 7-8 hours.