This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X720, 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 SI63X720
The AirTAC Airtac SI63 Standard Cylinder SI63X720 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 720mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X720, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke720 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X720
- 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 SI63X720
The AirTAC SI63X720 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 720mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X720, matching the interface, bore, stroke, output force, and mounting fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet and cannot accept a sensor.
Airtac SI63 Standard Cylinder SI63X720 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X720 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X720 |
| Bore size | Ø63 mm |
| Stroke | 720 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 SAI63X720 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 SAI63X720 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 SI63X720
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×720 | 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 SI63X720 Is Used
Long-Stroke Diversion
Pushes packages across a 720mm transfer zone using 1559N of thrust at 0.5 MPa, requiring external guide rails to support the extended rod.
Automated Press Ejection
Ejects formed parts from a press bed, utilizing the 30mm adjustable air cushions at both ends to decelerate the 20mm rod smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63X720 with the SAI63X720
To replace the SI63X720, order the SAI63X720. Confirm the ISO 15552 mounting interface, the G3/8 port thread (PT/G/NPT), and your specific mounting accessory (LB, FA, TC, etc.). Since this is a non-magnetized SKU, it cannot support CS1-B/DS1-B sensors; if position detection is needed, select an SAI model with an S suffix. A 720 mm stroke creates high rod-bending leverage, so use external guides to prevent side loads. For sizing, the neighboring 50mm bore yields 982 N push at 0.5 MPa, while the 80mm bore yields 2513 N. Remember that a standard cylinder drifts without live air; for load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X720
- ✓ 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 SI63X720 FAQ
Yes, the AirTAC SI63X720 is discontinued. The direct replacement is the SAI63X720. It is dimensionally interchangeable per ISO 15552, retaining the exact same 63mm bore, 720mm stroke, output force, G3/8 port, and mounting interface.
This 63mm bore double-acting cylinder uses a G3/8 air port. The thrust ratings are: 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.
Request a Quote for the SAI63X720
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X720 replacement — usually within 7-8 hours.