This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1440S, 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 SI63X1440S
The AirTAC Airtac SI63 Standard Cylinder SI63X1440S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1440mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1440S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1440 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1440S
- 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 SI63X1440S
The AirTAC SI63X1440S is a discontinued double-acting ISO 15552 profile cylinder. Delivering 1559 N push force at 0.5 MPa through a 63 mm bore and G3/8 port, it is replaced by the SAI63X1440S. This direct upgrade shares the exact ISO 15552 mounting interface, 1440 mm stroke, and output force. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
This -S model includes a piston magnet for legacy CS1-B/DS1-B switches (the SAI uses current AirTAC switches). The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Note that plain cylinders drift on air loss; the 30 mm adjustable cushions only decelerate near stroke ends. For 1440 mm strokes, external guides are critical to prevent rod bending.
Airtac SI63 Standard Cylinder SI63X1440S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1440S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1440S |
| Bore size | Ø63 mm |
| Stroke | 1440 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 SAI63X1440S 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 SAI63X1440S 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 SI63X1440S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1440 | 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 SI63X1440S Is Used
Long-Stroke Transfer
Pushing products between distant conveyor lanes using the full 1440 mm travel and 1559 N force.
Pallet Push-Off
Actuating large pallets or totes laterally where a 79 kg vertical lift margin is sufficient.
Elevator Lowering
Controlled descent of heavy fixtures, requiring external guides due to the 1440 mm stroke.
Replacing the Airtac SI63 Standard Cylinder SI63X1440S with the SAI63X1440S
To replace the SI63X1440S, order the SAI63X1440S. Confirm the ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread, and -S magnet. The 1440 mm stroke is within the 1500 mm standard limit, but at this length you must use external guides to prevent rod bending and side loads. Sizing both ways: the 63 mm bore gives 1559 N push at 0.5 MPa (safe load ~935 N), while the neighboring 80 mm bore offers 2513 N. If you need to hold a load vertically without live air, do not rely on the cushions; use an external pilot check valve or the SAIL/BSAI lock variant. Rod material options include carbon steel, SUS420J2 (A), and SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1440S
- ✓ 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 SI63X1440S FAQ
Yes, the SI63X1440S is discontinued. The direct replacement is the SAI63X1440S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 1440 mm stroke, G3/8 port, and mounting interface.
The 63 mm bore uses a G3/8 port. 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 SAI63X1440S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1440S replacement — usually within 7-8 hours.