This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X730S, 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 SI63X730S
The AirTAC Airtac SI63 Standard Cylinder SI63X730S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 730mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X730S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke730 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X730S
- 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 SI63X730S
The AirTAC SI63X730S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 730mm stroke. Delivering 1559N push force at 0.5MPa via a G3/8 port, it is replaced by the SAI63X730S. This direct upgrade matches the exact ISO 15552 mounting interface, bore, stroke, force and port size. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix means a built-in piston magnet for legacy CS1-B/DS1-B switches; the SAI uses current AirTAC switches.
Because the 730mm stroke is long, prevent rod bending by guiding the load externally. A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding, use the SAIL (air-released lock) or BSAI (clamp-lock) variants the SI lacked, or an external pilot check valve. The SAI family also adds the SAIF variant with a built-in 4M valve (bores 32-100). Rod material options include carbon steel, SUS420J2 (A) and SUS304 (B); seal options include NBR N and high-temp Viton H.
Airtac SI63 Standard Cylinder SI63X730S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X730S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X730S |
| Bore size | Ø63 mm |
| Stroke | 730 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 SAI63X730S 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 SAI63X730S 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 SI63X730S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×730 | 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 SI63X730S Is Used
Long-Stroke Diversion
Pushes packages across a 730mm conveyor lane using 1559N force, relying on external guides to prevent rod bending.
Press Ejection
Ejects formed parts from a press fixture, using the adjustable 30mm air cushions to decelerate at stroke ends.
Replacing the Airtac SI63 Standard Cylinder SI63X730S with the SAI63X730S
To replace the SI63X730S, order the SAI63X730S. Confirm the ISO 15552 mounting interface (LB foot, FA/FB flange, CA/CB clevis, or TC trunnion), the G3/8 port, the M16x1.5 rod thread, and the -S magnet. Sizing both ways: a 50mm bore gives 982N push at 0.5MPa, while an 80mm bore gives 2513N. The 63mm bore yields 1559N push and 1402N pull at 0.5MPa, 2182N at 0.7MPa, and a 318kgf max at 1.0MPa. For the 730mm stroke, use external guides to prevent side-load and rod-bending. The air cushion is 30mm at each end. If the application requires load holding on air loss, select the SAIL lock or BSAI clamp-lock variant, or fit an external rod lock, as standard cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X730S
- ✓ 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 SI63X730S FAQ
Yes, the SI63X730S is discontinued. The direct replacement is the SAI63X730S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 730mm stroke, G3/8 port, and mounting interface.
The G3/8 port bore delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N at 0.9MPa, and a 318kgf max at 1.0MPa. It operates at 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X730S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X730S replacement — usually within 7-8 hours.