This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X330S, 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 SI63X330S
The AirTAC Airtac SI63 Standard Cylinder SI63X330S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 330mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X330S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke330 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X330S
- 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 SI63X330S
The AirTAC SI63X330S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 330 mm stroke, delivering 1559 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI63X330S. The SAI is a direct upgrade: it matches the exact ISO 15552 mounting interface, bore, stroke, output force and port size, so it bolts right into existing fixtures.
The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for longer life and lower start-up pressure. The SI -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors, and seal options include Viton H for high-heat duties.
Airtac SI63 Standard Cylinder SI63X330S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X330S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X330S |
| Bore size | Ø63 mm |
| Stroke | 330 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 SAI63X330S 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 SAI63X330S 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 SI63X330S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×330 | 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 SI63X330S Is Used
Pallet Diversion
Actuates routing gates on packaging lines using the 1559 N push force at 0.5 MPa to deflect heavy pallets reliably.
Material Ejection
Pushes completed assemblies from machining centers, utilizing the 330 mm stroke to clear the work envelope completely.
Replacing the Airtac SI63 Standard Cylinder SI63X330S with the SAI63X330S
To replace the SI63X330S, order the SAI63X330S and confirm your ISO 15552 mounting accessory (LB, FA, TC, etc.), 330 mm stroke, G3/8 port thread (PT/G/NPT) and the -S magnet. When sizing, note this bore yields 1559 N push and 1402 N pull at 0.5 MPa; if you need less force, step down to a 50 mm bore (982 N push), or step up to an 80 mm bore (2513 N push) for heavier loads. Because this is a 330 mm stroke, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X330S
- ✓ 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 SI63X330S FAQ
Yes, the SI63X330S is discontinued. The direct replacement is the AirTAC SAI63X330S. It shares the same ISO 15552 mounting interface, 63 mm bore, 330 mm stroke, output force and G3/8 port, fitting existing fixtures perfectly while adding an upgraded piston seal.
This 63 mm bore cylinder uses a G3/8 air port. It generates 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. The piston rod is 20 mm with an M16x1.5 thread, and speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X330S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X330S replacement — usually within 7-8 hours.