This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X320SN, 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 SI63X320SN
The AirTAC SI63 Standard Cylinder SI63X320SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 320mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X320SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke320 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X320SN
- 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 SI63X320SN
The AirTAC SI63X320SN is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 320mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa, operating via a G3/8 port. AirTAC replaced this legacy unit with the SAI63X320SN, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original -S magnet supports CS1-B/DS1-B sensors, while the -N NBR seal handles -20 to +70C. Note that standard cylinders drift without live air; use the SAIL lock variant or external pilot check valve for load holding.
Airtac SI63 Standard Cylinder SI63X320SN Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X320SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X320SN |
| Bore size | Ø63 mm |
| Stroke | 320 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 SAI63X320SN 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 SAI63X320SN 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 SI63X320SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×320 | 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 SI63X320SN Is Used
Material Diversion
Actuates routing gates on packaging lines, utilizing the 1559N push force at 0.5MPa to deflect heavy cartons reliably.
Pallet Handling
Drives 320mm stroke stops and lifts in end-of-line palletizers, requiring external guides to manage side loads.
Replacing the Airtac SI63 Standard Cylinder SI63X320SN with the SAI63X320SN
To replace the SI63X320SN, order the SAI63X320SN. It drops directly into existing fixtures via the ISO 15552 mounting dimensions, matching the 63mm bore, 320mm stroke, M16x1.5 rod thread, and G3/8 port. Because this is a 320mm stroke, add external guides to prevent rod bending and side-load wear. If you need more force, the neighbouring 80mm bore yields 2513N push at 0.5MPa; if less is required, the 50mm bore gives 982N. A plain cylinder does not hold load on air loss—the cushion only decelerates. For holding, specify the SAIL air-released lock, the BSAI clamp-lock, or an external rod lock. The -S magnet works with CS1-B/DS1-B switches, and the SAI family also offers the SAIF integrated valve variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X320SN
- ✓ 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 SI63X320SN FAQ
Yes, the SI63X320SN is discontinued. The direct replacement is the SAI63X320SN. It shares the identical ISO 15552 mounting interface, 63mm bore, 320mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X320SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X320SN replacement — usually within 7-8 hours.