This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1500S, 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 SI63X1500S
The AirTAC Airtac SI63 Standard Cylinder SI63X1500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1500mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1500S
- 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 SI63X1500S
The AirTAC SI63X1500S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 1500mm stroke. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI63X1500S. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force and port size. The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life.
The SAI family expands on the legacy SI line by adding variants like the SAIL air-released lock and BSAI clamp-lock, which the original series lacked. The built-in magnet on this -S model supports CS1-B/DS1-B sensors, while the SAI replacement uses current AirTAC switches. A plain ISO 15552 cylinder does not hold load without live air; the adjustable 30 mm cushions only decelerate near stroke ends. For secure load holding, an external rod lock or pilot check valve is required.
Airtac SI63 Standard Cylinder SI63X1500S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1500S |
| Bore size | Ø63 mm |
| Stroke | 1500 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 SAI63X1500S 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 SAI63X1500S 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 SI63X1500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1500 | 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 SI63X1500S Is Used
Long-Stroke Transfer
Pushes workpieces between machining stations over a 1500mm distance using 1559 N of thrust at 0.5 MPa.
Automated Clamping
Actuates large fixtures with 2182 N force at 0.7 MPa, using the G3/8 port for rapid actuation.
Replacing the Airtac SI63 Standard Cylinder SI63X1500S with the SAI63X1500S
To replace the discontinued SI63X1500S, order the SAI63X1500S direct. Confirm the ISO 15552 mounting interface, 63mm bore, 1500mm stroke, M16x1.5 rod thread, G3/8 port (PT/G/NPT options), and the -S magnet. Sizing both ways: a 50mm bore yields 982 N push at 0.5 MPa, while an 80mm bore yields 2513 N. If your application needs load holding on air loss, step up to the SAIL or BSAI lock variant, or use an external pilot check valve. Because 1500mm is a long stroke, prevent rod bending and side-load damage by using an external guide to support the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1500S
- ✓ 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 SI63X1500S FAQ
Yes, the SI63X1500S is discontinued. The direct replacement is the SAI63X1500S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 1500mm stroke, output force, G3/8 port and mounting accessories.
The 63mm bore features a G3/8 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, with a theoretical max of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1500S replacement — usually within 7-8 hours.